291 lines
9.4 KiB
Swift
291 lines
9.4 KiB
Swift
import Spectre
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@testable import Stencil
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import XCTest
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final class IfNodeTests: XCTestCase {
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func testParseIf() {
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it("can parse an if block") {
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let tokens: [Token] = [
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.block(value: "if value", at: .unknown),
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.text(value: "true", at: .unknown),
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.block(value: "endif", at: .unknown)
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]
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let parser = TokenParser(tokens: tokens, environment: Environment())
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let nodes = try parser.parse()
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let node = nodes.first as? IfNode
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let conditions = node?.conditions
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try expect(conditions?.count) == 1
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try expect(conditions?[0].nodes.count) == 1
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let trueNode = conditions?[0].nodes.first as? TextNode
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try expect(trueNode?.text) == "true"
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}
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it("can parse an if with complex expression") {
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let tokens: [Token] = [
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.block(value: """
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if value == \"test\" and (not name or not (name and surname) or( some )and other )
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""", at: .unknown),
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.text(value: "true", at: .unknown),
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.block(value: "endif", at: .unknown)
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]
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let parser = TokenParser(tokens: tokens, environment: Environment())
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let nodes = try parser.parse()
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try expect(nodes.first is IfNode).beTrue()
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}
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}
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func testParseIfWithElse() throws {
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let tokens: [Token] = [
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.block(value: "if value", at: .unknown),
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.text(value: "true", at: .unknown),
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.block(value: "else", at: .unknown),
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.text(value: "false", at: .unknown),
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.block(value: "endif", at: .unknown)
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]
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let parser = TokenParser(tokens: tokens, environment: Environment())
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let nodes = try parser.parse()
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let node = nodes.first as? IfNode
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let conditions = node?.conditions
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try expect(conditions?.count) == 2
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try expect(conditions?[0].nodes.count) == 1
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let trueNode = conditions?[0].nodes.first as? TextNode
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try expect(trueNode?.text) == "true"
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try expect(conditions?[1].nodes.count) == 1
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let falseNode = conditions?[1].nodes.first as? TextNode
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try expect(falseNode?.text) == "false"
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}
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func testParseIfWithElif() throws {
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let tokens: [Token] = [
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.block(value: "if value", at: .unknown),
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.text(value: "true", at: .unknown),
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.block(value: "elif something", at: .unknown),
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.text(value: "some", at: .unknown),
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.block(value: "else", at: .unknown),
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.text(value: "false", at: .unknown),
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.block(value: "endif", at: .unknown)
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]
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let parser = TokenParser(tokens: tokens, environment: Environment())
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let nodes = try parser.parse()
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let node = nodes.first as? IfNode
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let conditions = node?.conditions
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try expect(conditions?.count) == 3
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try expect(conditions?[0].nodes.count) == 1
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let trueNode = conditions?[0].nodes.first as? TextNode
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try expect(trueNode?.text) == "true"
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try expect(conditions?[1].nodes.count) == 1
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let elifNode = conditions?[1].nodes.first as? TextNode
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try expect(elifNode?.text) == "some"
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try expect(conditions?[2].nodes.count) == 1
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let falseNode = conditions?[2].nodes.first as? TextNode
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try expect(falseNode?.text) == "false"
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}
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func testParseIfWithElifWithoutElse() throws {
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let tokens: [Token] = [
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.block(value: "if value", at: .unknown),
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.text(value: "true", at: .unknown),
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.block(value: "elif something", at: .unknown),
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.text(value: "some", at: .unknown),
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.block(value: "endif", at: .unknown)
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]
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let parser = TokenParser(tokens: tokens, environment: Environment())
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let nodes = try parser.parse()
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let node = nodes.first as? IfNode
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let conditions = node?.conditions
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try expect(conditions?.count) == 2
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try expect(conditions?[0].nodes.count) == 1
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let trueNode = conditions?[0].nodes.first as? TextNode
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try expect(trueNode?.text) == "true"
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try expect(conditions?[1].nodes.count) == 1
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let elifNode = conditions?[1].nodes.first as? TextNode
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try expect(elifNode?.text) == "some"
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}
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func testParseMultipleElif() throws {
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let tokens: [Token] = [
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.block(value: "if value", at: .unknown),
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.text(value: "true", at: .unknown),
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.block(value: "elif something1", at: .unknown),
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.text(value: "some1", at: .unknown),
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.block(value: "elif something2", at: .unknown),
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.text(value: "some2", at: .unknown),
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.block(value: "else", at: .unknown),
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.text(value: "false", at: .unknown),
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.block(value: "endif", at: .unknown)
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]
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let parser = TokenParser(tokens: tokens, environment: Environment())
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let nodes = try parser.parse()
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let node = nodes.first as? IfNode
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let conditions = node?.conditions
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try expect(conditions?.count) == 4
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try expect(conditions?[0].nodes.count) == 1
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let trueNode = conditions?[0].nodes.first as? TextNode
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try expect(trueNode?.text) == "true"
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try expect(conditions?[1].nodes.count) == 1
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let elifNode = conditions?[1].nodes.first as? TextNode
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try expect(elifNode?.text) == "some1"
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try expect(conditions?[2].nodes.count) == 1
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let elif2Node = conditions?[2].nodes.first as? TextNode
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try expect(elif2Node?.text) == "some2"
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try expect(conditions?[3].nodes.count) == 1
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let falseNode = conditions?[3].nodes.first as? TextNode
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try expect(falseNode?.text) == "false"
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}
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func testParseIfnot() throws {
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let tokens: [Token] = [
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.block(value: "ifnot value", at: .unknown),
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.text(value: "false", at: .unknown),
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.block(value: "else", at: .unknown),
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.text(value: "true", at: .unknown),
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.block(value: "endif", at: .unknown)
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]
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let parser = TokenParser(tokens: tokens, environment: Environment())
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let nodes = try parser.parse()
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let node = nodes.first as? IfNode
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let conditions = node?.conditions
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try expect(conditions?.count) == 2
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try expect(conditions?[0].nodes.count) == 1
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let trueNode = conditions?[0].nodes.first as? TextNode
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try expect(trueNode?.text) == "true"
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try expect(conditions?[1].nodes.count) == 1
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let falseNode = conditions?[1].nodes.first as? TextNode
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try expect(falseNode?.text) == "false"
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}
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func testParsingErrors() {
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it("throws an error when parsing an if block without an endif") {
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let tokens: [Token] = [.block(value: "if value", at: .unknown)]
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let parser = TokenParser(tokens: tokens, environment: Environment())
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let error = TemplateSyntaxError(reason: "`endif` was not found.", token: tokens.first)
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try expect(try parser.parse()).toThrow(error)
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}
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it("throws an error when parsing an ifnot without an endif") {
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let tokens: [Token] = [.block(value: "ifnot value", at: .unknown)]
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let parser = TokenParser(tokens: tokens, environment: Environment())
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let error = TemplateSyntaxError(reason: "`endif` was not found.", token: tokens.first)
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try expect(try parser.parse()).toThrow(error)
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}
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}
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func testRendering() {
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it("renders a true expression") {
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let node = IfNode(conditions: [
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IfCondition(expression: VariableExpression(variable: Variable("true")), nodes: [TextNode(text: "1")]),
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IfCondition(expression: VariableExpression(variable: Variable("true")), nodes: [TextNode(text: "2")]),
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IfCondition(expression: nil, nodes: [TextNode(text: "3")])
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])
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try expect(try node.render(Context())) == "1"
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}
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it("renders the first true expression") {
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let node = IfNode(conditions: [
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IfCondition(expression: VariableExpression(variable: Variable("false")), nodes: [TextNode(text: "1")]),
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IfCondition(expression: VariableExpression(variable: Variable("true")), nodes: [TextNode(text: "2")]),
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IfCondition(expression: nil, nodes: [TextNode(text: "3")])
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])
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try expect(try node.render(Context())) == "2"
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}
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it("renders the empty expression when other conditions are falsy") {
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let node = IfNode(conditions: [
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IfCondition(expression: VariableExpression(variable: Variable("false")), nodes: [TextNode(text: "1")]),
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IfCondition(expression: VariableExpression(variable: Variable("false")), nodes: [TextNode(text: "2")]),
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IfCondition(expression: nil, nodes: [TextNode(text: "3")])
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])
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try expect(try node.render(Context())) == "3"
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}
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it("renders empty when no truthy conditions") {
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let node = IfNode(conditions: [
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IfCondition(expression: VariableExpression(variable: Variable("false")), nodes: [TextNode(text: "1")]),
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IfCondition(expression: VariableExpression(variable: Variable("false")), nodes: [TextNode(text: "2")])
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])
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try expect(try node.render(Context())) == ""
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}
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}
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func testSupportVariableFilters() throws {
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let tokens: [Token] = [
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.block(value: "if value|uppercase == \"TEST\"", at: .unknown),
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.text(value: "true", at: .unknown),
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.block(value: "endif", at: .unknown)
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]
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let parser = TokenParser(tokens: tokens, environment: Environment())
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let nodes = try parser.parse()
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let result = try renderNodes(nodes, Context(dictionary: ["value": "test"]))
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try expect(result) == "true"
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}
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func testEvaluatesNilAsFalse() throws {
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let tokens: [Token] = [
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.block(value: "if instance.value", at: .unknown),
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.text(value: "true", at: .unknown),
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.block(value: "endif", at: .unknown)
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]
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let parser = TokenParser(tokens: tokens, environment: Environment())
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let nodes = try parser.parse()
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let result = try renderNodes(nodes, Context(dictionary: ["instance": SomeType()]))
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try expect(result) == ""
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}
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func testSupportsRangeVariables() throws {
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let tokens: [Token] = [
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.block(value: "if value in 1...3", at: .unknown),
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.text(value: "true", at: .unknown),
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.block(value: "else", at: .unknown),
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.text(value: "false", at: .unknown),
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.block(value: "endif", at: .unknown)
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]
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let parser = TokenParser(tokens: tokens, environment: Environment())
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let nodes = try parser.parse()
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try expect(renderNodes(nodes, Context(dictionary: ["value": 3]))) == "true"
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try expect(renderNodes(nodes, Context(dictionary: ["value": 4]))) == "false"
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}
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}
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// MARK: - Helpers
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private struct SomeType {
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let value: String? = nil
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}
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