356 lines
12 KiB
Swift
356 lines
12 KiB
Swift
import Spectre
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@testable import Stencil
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import XCTest
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final class ExpressionsTests: XCTestCase {
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private let parser = TokenParser(tokens: [], environment: Environment())
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private func makeExpression(_ components: [String]) -> Expression {
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do {
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let parser = try IfExpressionParser.parser(
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components: components,
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environment: Environment(),
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token: .text(value: "", at: .unknown)
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)
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return try parser.parse()
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} catch {
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fatalError(error.localizedDescription)
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}
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}
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func testTrueExpressions() {
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let expression = VariableExpression(variable: Variable("value"))
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it("evaluates to true when value is not nil") {
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let context = Context(dictionary: ["value": "known"])
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try expect(try expression.evaluate(context: context)).to.beTrue()
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}
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it("evaluates to true when array variable is not empty") {
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let items: [[String: Any]] = [["key": "key1", "value": 42], ["key": "key2", "value": 1_337]]
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let context = Context(dictionary: ["value": [items]])
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try expect(try expression.evaluate(context: context)).to.beTrue()
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}
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it("evaluates to false when dictionary value is empty") {
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let emptyItems = [String: Any]()
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let context = Context(dictionary: ["value": emptyItems])
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try expect(try expression.evaluate(context: context)).to.beFalse()
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}
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it("evaluates to true when integer value is above 0") {
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let context = Context(dictionary: ["value": 1])
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try expect(try expression.evaluate(context: context)).to.beTrue()
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}
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it("evaluates to true with string") {
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let context = Context(dictionary: ["value": "test"])
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try expect(try expression.evaluate(context: context)).to.beTrue()
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}
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it("evaluates to true when float value is above 0") {
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let context = Context(dictionary: ["value": Float(0.5)])
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try expect(try expression.evaluate(context: context)).to.beTrue()
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}
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it("evaluates to true when double value is above 0") {
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let context = Context(dictionary: ["value": Double(0.5)])
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try expect(try expression.evaluate(context: context)).to.beTrue()
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}
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}
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func testFalseExpressions() {
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let expression = VariableExpression(variable: Variable("value"))
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it("evaluates to false when value is unset") {
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let context = Context()
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try expect(try expression.evaluate(context: context)).to.beFalse()
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}
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it("evaluates to false when array value is empty") {
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let emptyItems = [[String: Any]]()
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let context = Context(dictionary: ["value": emptyItems])
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try expect(try expression.evaluate(context: context)).to.beFalse()
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}
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it("evaluates to false when dictionary value is empty") {
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let emptyItems = [String: Any]()
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let context = Context(dictionary: ["value": emptyItems])
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try expect(try expression.evaluate(context: context)).to.beFalse()
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}
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it("evaluates to false when Array<Any> value is empty") {
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let context = Context(dictionary: ["value": ([] as [Any])])
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try expect(try expression.evaluate(context: context)).to.beFalse()
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}
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it("evaluates to false when empty string") {
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let context = Context(dictionary: ["value": ""])
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try expect(try expression.evaluate(context: context)).to.beFalse()
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}
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it("evaluates to false when integer value is below 0 or below") {
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let context = Context(dictionary: ["value": 0])
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try expect(try expression.evaluate(context: context)).to.beFalse()
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let negativeContext = Context(dictionary: ["value": -1])
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try expect(try expression.evaluate(context: negativeContext)).to.beFalse()
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}
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it("evaluates to false when float is 0 or below") {
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let context = Context(dictionary: ["value": Float(0)])
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try expect(try expression.evaluate(context: context)).to.beFalse()
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}
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it("evaluates to false when double is 0 or below") {
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let context = Context(dictionary: ["value": Double(0)])
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try expect(try expression.evaluate(context: context)).to.beFalse()
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}
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it("evaluates to false when uint is 0") {
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let context = Context(dictionary: ["value": UInt(0)])
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try expect(try expression.evaluate(context: context)).to.beFalse()
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}
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}
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func testNotExpression() {
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it("returns truthy for positive expressions") {
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let expression = NotExpression(expression: StaticExpression(value: true))
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try expect(expression.evaluate(context: Context())).to.beFalse()
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}
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it("returns falsy for negative expressions") {
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let expression = NotExpression(expression: StaticExpression(value: false))
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try expect(expression.evaluate(context: Context())).to.beTrue()
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}
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}
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func testExpressionParsing() {
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it("can parse a variable expression") {
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let expression = self.makeExpression(["value"])
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try expect(expression.evaluate(context: Context())).to.beFalse()
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try expect(expression.evaluate(context: Context(dictionary: ["value": true]))).to.beTrue()
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}
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it("can parse a not expression") {
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let expression = self.makeExpression(["not", "value"])
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try expect(expression.evaluate(context: Context())).to.beTrue()
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try expect(expression.evaluate(context: Context(dictionary: ["value": true]))).to.beFalse()
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}
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}
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func testAndExpression() {
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let expression = makeExpression(["lhs", "and", "rhs"])
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it("evaluates to false with lhs false") {
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try expect(expression.evaluate(context: Context(dictionary: ["lhs": false, "rhs": true]))).to.beFalse()
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}
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it("evaluates to false with rhs false") {
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try expect(expression.evaluate(context: Context(dictionary: ["lhs": true, "rhs": false]))).to.beFalse()
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}
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it("evaluates to false with lhs and rhs false") {
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try expect(expression.evaluate(context: Context(dictionary: ["lhs": false, "rhs": false]))).to.beFalse()
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}
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it("evaluates to true with lhs and rhs true") {
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try expect(expression.evaluate(context: Context(dictionary: ["lhs": true, "rhs": true]))).to.beTrue()
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}
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}
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func testOrExpression() {
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let expression = makeExpression(["lhs", "or", "rhs"])
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it("evaluates to true with lhs true") {
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try expect(expression.evaluate(context: Context(dictionary: ["lhs": true, "rhs": false]))).to.beTrue()
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}
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it("evaluates to true with rhs true") {
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try expect(expression.evaluate(context: Context(dictionary: ["lhs": false, "rhs": true]))).to.beTrue()
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}
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it("evaluates to true with lhs and rhs true") {
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try expect(expression.evaluate(context: Context(dictionary: ["lhs": true, "rhs": true]))).to.beTrue()
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}
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it("evaluates to false with lhs and rhs false") {
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try expect(expression.evaluate(context: Context(dictionary: ["lhs": false, "rhs": false]))).to.beFalse()
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}
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}
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func testEqualityExpression() {
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let expression = makeExpression(["lhs", "==", "rhs"])
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it("evaluates to true with equal lhs/rhs") {
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try expect(expression.evaluate(context: Context(dictionary: ["lhs": "a", "rhs": "a"]))).to.beTrue()
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}
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it("evaluates to false with non equal lhs/rhs") {
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try expect(expression.evaluate(context: Context(dictionary: ["lhs": "a", "rhs": "b"]))).to.beFalse()
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}
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it("evaluates to true with nils") {
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try expect(expression.evaluate(context: Context(dictionary: [:]))).to.beTrue()
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}
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it("evaluates to true with numbers") {
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try expect(expression.evaluate(context: Context(dictionary: ["lhs": 1, "rhs": 1.0]))).to.beTrue()
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}
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it("evaluates to false with non equal numbers") {
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try expect(expression.evaluate(context: Context(dictionary: ["lhs": 1, "rhs": 1.1]))).to.beFalse()
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}
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it("evaluates to true with booleans") {
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try expect(expression.evaluate(context: Context(dictionary: ["lhs": true, "rhs": true]))).to.beTrue()
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}
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it("evaluates to false with falsy booleans") {
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try expect(expression.evaluate(context: Context(dictionary: ["lhs": true, "rhs": false]))).to.beFalse()
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}
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it("evaluates to false with different types") {
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try expect(expression.evaluate(context: Context(dictionary: ["lhs": true, "rhs": 1]))).to.beFalse()
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}
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}
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func testInequalityExpression() {
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let expression = makeExpression(["lhs", "!=", "rhs"])
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it("evaluates to true with inequal lhs/rhs") {
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try expect(expression.evaluate(context: Context(dictionary: ["lhs": "a", "rhs": "b"]))).to.beTrue()
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}
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it("evaluates to false with equal lhs/rhs") {
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try expect(expression.evaluate(context: Context(dictionary: ["lhs": "b", "rhs": "b"]))).to.beFalse()
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}
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}
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func testMoreThanExpression() {
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let expression = makeExpression(["lhs", ">", "rhs"])
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it("evaluates to true with lhs > rhs") {
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try expect(expression.evaluate(context: Context(dictionary: ["lhs": 5.0, "rhs": 4]))).to.beTrue()
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}
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it("evaluates to false with lhs == rhs") {
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try expect(expression.evaluate(context: Context(dictionary: ["lhs": 5.0, "rhs": 5.0]))).to.beFalse()
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}
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}
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func testMoreThanEqualExpression() {
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let expression = makeExpression(["lhs", ">=", "rhs"])
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it("evaluates to true with lhs == rhs") {
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try expect(expression.evaluate(context: Context(dictionary: ["lhs": 5.0, "rhs": 5]))).to.beTrue()
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}
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it("evaluates to false with lhs < rhs") {
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try expect(expression.evaluate(context: Context(dictionary: ["lhs": 5.0, "rhs": 5.1]))).to.beFalse()
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}
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}
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func testLessThanExpression() {
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let expression = makeExpression(["lhs", "<", "rhs"])
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it("evaluates to true with lhs < rhs") {
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try expect(expression.evaluate(context: Context(dictionary: ["lhs": 4, "rhs": 4.5]))).to.beTrue()
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}
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it("evaluates to false with lhs == rhs") {
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try expect(expression.evaluate(context: Context(dictionary: ["lhs": 5.0, "rhs": 5.0]))).to.beFalse()
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}
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}
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func testLessThanEqualExpression() {
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let expression = makeExpression(["lhs", "<=", "rhs"])
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it("evaluates to true with lhs == rhs") {
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try expect(expression.evaluate(context: Context(dictionary: ["lhs": 5.0, "rhs": 5]))).to.beTrue()
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}
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it("evaluates to false with lhs > rhs") {
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try expect(expression.evaluate(context: Context(dictionary: ["lhs": 5.1, "rhs": 5.0]))).to.beFalse()
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}
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}
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func testMultipleExpressions() {
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let expression = makeExpression(["one", "or", "two", "and", "not", "three"])
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it("evaluates to true with one") {
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try expect(expression.evaluate(context: Context(dictionary: ["one": true]))).to.beTrue()
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}
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it("evaluates to true with one and three") {
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try expect(expression.evaluate(context: Context(dictionary: ["one": true, "three": true]))).to.beTrue()
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}
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it("evaluates to true with two") {
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try expect(expression.evaluate(context: Context(dictionary: ["two": true]))).to.beTrue()
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}
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it("evaluates to false with two and three") {
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try expect(expression.evaluate(context: Context(dictionary: ["two": true, "three": true]))).to.beFalse()
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}
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it("evaluates to false with two and three") {
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try expect(expression.evaluate(context: Context(dictionary: ["two": true, "three": true]))).to.beFalse()
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}
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it("evaluates to false with nothing") {
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try expect(expression.evaluate(context: Context())).to.beFalse()
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}
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}
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func testTrueInExpression() throws {
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let expression = makeExpression(["lhs", "in", "rhs"])
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try expect(expression.evaluate(context: Context(dictionary: [
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"lhs": 1,
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"rhs": [1, 2, 3]
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]))).to.beTrue()
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try expect(expression.evaluate(context: Context(dictionary: [
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"lhs": "a",
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"rhs": ["a", "b", "c"]
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]))).to.beTrue()
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try expect(expression.evaluate(context: Context(dictionary: [
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"lhs": "a",
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"rhs": "abc"
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]))).to.beTrue()
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try expect(expression.evaluate(context: Context(dictionary: [
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"lhs": 1,
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"rhs": 1...3
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]))).to.beTrue()
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try expect(expression.evaluate(context: Context(dictionary: [
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"lhs": 1,
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"rhs": 1..<3
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]))).to.beTrue()
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}
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func testFalseInExpression() throws {
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let expression = makeExpression(["lhs", "in", "rhs"])
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try expect(expression.evaluate(context: Context(dictionary: [
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"lhs": 1,
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"rhs": [2, 3, 4]
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]))).to.beFalse()
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try expect(expression.evaluate(context: Context(dictionary: [
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"lhs": "a",
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"rhs": ["b", "c", "d"]
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]))).to.beFalse()
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try expect(expression.evaluate(context: Context(dictionary: [
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"lhs": "a",
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"rhs": "bcd"
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]))).to.beFalse()
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try expect(expression.evaluate(context: Context(dictionary: [
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"lhs": 4,
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"rhs": 1...3
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]))).to.beFalse()
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try expect(expression.evaluate(context: Context(dictionary: [
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"lhs": 3,
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"rhs": 1..<3
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]))).to.beFalse()
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}
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}
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