223 lines
8.8 KiB
Swift
223 lines
8.8 KiB
Swift
import Spectre
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@testable import Stencil
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func testExpressions() {
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describe("Expression") {
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$0.describe("VariableExpression") {
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let expression = VariableExpression(variable: Variable("value"))
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$0.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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$0.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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$0.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":1337]]
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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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$0.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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$0.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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$0.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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$0.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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$0.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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$0.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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$0.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": 0])
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try expect(try expression.evaluate(context: negativeContext)).to.beFalse()
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}
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$0.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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$0.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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$0.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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$0.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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$0.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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$0.describe("NotExpression") {
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$0.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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$0.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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$0.describe("expression parsing") {
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$0.it("can parse a variable expression") {
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let expression = try parseExpression(components: ["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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$0.it("can parse a not expression") {
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let expression = try parseExpression(components: ["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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$0.describe("and expression") {
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let expression = try! parseExpression(components: ["lhs", "and", "rhs"])
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$0.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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$0.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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$0.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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$0.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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$0.describe("or expression") {
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let expression = try! parseExpression(components: ["lhs", "or", "rhs"])
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$0.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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$0.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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$0.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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$0.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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$0.describe("equality expression") {
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let expression = try! parseExpression(components: ["lhs", "==", "rhs"])
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$0.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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$0.it("evaluates to false with non equal lhs/rhs") {
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print(expression)
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}
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$0.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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$0.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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$0.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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$0.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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$0.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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$0.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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$0.describe("multiple expression") {
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let expression = try! parseExpression(components: ["one", "or", "two", "and", "not", "three"])
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$0.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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$0.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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$0.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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$0.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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$0.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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$0.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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}
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}
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}
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