255 lines
11 KiB
Swift
255 lines
11 KiB
Swift
import Spectre
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import PathKit
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@testable import Stencil
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func testEnvironment() {
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describe("Environment") {
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let environment = Environment(loader: ExampleLoader())
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$0.it("can load a template from a name") {
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let template = try environment.loadTemplate(name: "example.html")
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try expect(template.name) == "example.html"
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}
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$0.it("can load a template from a names") {
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let template = try environment.loadTemplate(names: ["first.html", "example.html"])
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try expect(template.name) == "example.html"
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}
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$0.it("can render a template from a string") {
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let result = try environment.renderTemplate(string: "Hello World")
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try expect(result) == "Hello World"
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}
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$0.it("can render a template from a file") {
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let result = try environment.renderTemplate(name: "example.html")
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try expect(result) == "Hello World!"
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}
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$0.it("allows you to provide a custom template class") {
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let environment = Environment(loader: ExampleLoader(), templateClass: CustomTemplate.self)
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let result = try environment.renderTemplate(string: "Hello World")
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try expect(result) == "here"
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}
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func expectedSyntaxError(token: String, template: Template, description: String) -> TemplateSyntaxError {
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var error = TemplateSyntaxError(description)
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error.lexeme = Token.block(value: token, at: template.templateString.range(of: token)!)
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let context = ErrorReporterContext(template: template)
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error = environment.errorReporter.contextAwareError(error, at: error.lexeme?.range, context: context) as! TemplateSyntaxError
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return error
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}
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$0.it("reports syntax error on invalid for tag syntax") {
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let template: Template = "Hello {% for name in %}{{ name }}, {% endfor %}!"
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let error = expectedSyntaxError(
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token: "{% for name in %}",
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template: template,
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description: "'for' statements should use the following syntax 'for x in y where condition'."
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)
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try expect(try environment.renderTemplate(string: template.templateString, context:["names": ["Bob", "Alice"]])).toThrow(error)
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}
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$0.it("reports syntax error on missing endfor") {
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let template: Template = "{% for name in names %}{{ name }}"
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let error = expectedSyntaxError(
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token: "{% for name in names %}",
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template: template,
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description: "`endfor` was not found."
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)
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try expect(try environment.renderTemplate(string: template.templateString, context: ["names": ["Bob", "Alice"]])).toThrow(error)
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}
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$0.it("reports syntax error on unknown tag") {
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let template: Template = "{% for name in names %}{{ name }}{% end %}"
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let error = expectedSyntaxError(
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token: "{% end %}",
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template: template,
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description: "Unknown template tag 'end'"
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)
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try expect(try environment.renderTemplate(string: template.templateString, context: ["names": ["Bob", "Alice"]])).toThrow(error)
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}
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$0.context("given unknown filter") {
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func expectedFilterError(token: String, template: Template) -> TemplateSyntaxError {
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return expectedSyntaxError(
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token: token,
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template: template,
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description: "Unknown filter 'unknown'"
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)
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}
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$0.it("reports syntax error in for tag") {
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let template: Template = "{% for name in names|unknown %}{{ name }}{% endfor %}"
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let error = expectedFilterError(token: "names|unknown", template: template)
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try expect(try environment.renderTemplate(string: template.templateString, context: ["names": ["Bob", "Alice"]])).toThrow(error)
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}
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$0.it("reports syntax error in for-where tag") {
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let template: Template = "{% for name in names where name|unknown %}{{ name }}{% endfor %}"
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let error = expectedFilterError(token: "name|unknown", template: template)
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try expect(try environment.renderTemplate(string: template.templateString, context: ["names": ["Bob", "Alice"]])).toThrow(error)
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}
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$0.it("reports syntax error in if tag") {
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let template: Template = "{% if name|unknown %}{{ name }}{% endif %}"
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let error = expectedFilterError(token: "name|unknown", template: template)
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try expect(try environment.renderTemplate(string: template.templateString, context: ["name": "Bob"])).toThrow(error)
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}
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$0.it("reports syntax error in elif tag") {
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let template: Template = "{% if name %}{{ name }}{% elif name|unknown %}{% endif %}"
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let error = expectedFilterError(token: "name|unknown", template: template)
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try expect(try environment.renderTemplate(string: template.templateString, context: ["name": "Bob"])).toThrow(error)
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}
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$0.it("reports syntax error in ifnot tag") {
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let template: Template = "{% ifnot name|unknown %}{{ name }}{% endif %}"
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let error = expectedFilterError(token: "name|unknown", template: template)
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try expect(try environment.renderTemplate(string: template.templateString, context: ["name": "Bob"])).toThrow(error)
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}
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$0.it("reports syntax error in filter tag") {
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let template: Template = "{% filter unknown %}Text{% endfilter %}"
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let error = expectedFilterError(token: "{% filter unknown %}", template: template)
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try expect(try environment.renderTemplate(string: template.templateString, context: [:])).toThrow(error)
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}
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$0.it("reports syntax error in variable tag") {
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let template: Template = "{{ name|unknown }}"
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let error = expectedFilterError(token: "name|unknown", template: template)
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try expect(try environment.renderTemplate(string: template.templateString, context: ["name": "Bob"])).toThrow(error)
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}
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}
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$0.context("given rendering error") {
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$0.it("reports rendering error in variable filter") {
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let template: Template = "{{ name|throw }}"
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var environment = environment
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let filterExtension = Extension()
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filterExtension.registerFilter("throw") { (value: Any?) in
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throw TemplateSyntaxError("Filter rendering error")
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}
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environment.extensions += [filterExtension]
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let error = expectedSyntaxError(token: "name|throw", template: template, description: "Filter rendering error")
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try expect(try environment.renderTemplate(string: template.templateString, context: ["name": "Bob"])).toThrow(error)
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}
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$0.it("reports rendering error in filter tag") {
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let template: Template = "{% filter throw %}Test{% endfilter %}"
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var environment = environment
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let filterExtension = Extension()
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filterExtension.registerFilter("throw") { (value: Any?) in
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throw TemplateSyntaxError("Filter rendering error")
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}
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environment.extensions += [filterExtension]
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let error = expectedSyntaxError(token: "filter throw", template: template, description: "Filter rendering error")
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try expect(try environment.renderTemplate(string: template.templateString, context: [:])).toThrow(error)
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}
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$0.it("reports rendering error in simple tag") {
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let template: Template = "{% simpletag %}"
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var environment = environment
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let tagExtension = Extension()
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tagExtension.registerSimpleTag("simpletag") { context in
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throw TemplateSyntaxError("simpletag error")
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}
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environment.extensions += [tagExtension]
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let error = expectedSyntaxError(token: "simpletag", template: template, description: "simpletag error")
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try expect(try environment.renderTemplate(string: template.templateString, context: [:])).toThrow(error)
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}
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$0.it("reporsts passing argument to simple filter") {
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let template: Template = "{{ name|uppercase:5 }}"
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let error = expectedSyntaxError(token: "name|uppercase:5", template: template, description: "cannot invoke filter with an argument")
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try expect(try environment.renderTemplate(string: template.templateString, context: ["name": "kyle"])).toThrow(error)
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}
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$0.it("reports rendering error in custom tag") {
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let template: Template = "{% customtag %}"
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var environment = environment
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let tagExtension = Extension()
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tagExtension.registerTag("customtag") { parser, token in
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return ErrorNode(token: token)
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}
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environment.extensions += [tagExtension]
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let error = expectedSyntaxError(token: "customtag", template: template, description: "Custom Error")
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try expect(try environment.renderTemplate(string: template.templateString, context: [:])).toThrow(error)
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}
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$0.it("reports rendering error in for body") {
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let template: Template = "{% for item in array %}{% customtag %}{% endfor %}"
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var environment = environment
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let tagExtension = Extension()
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tagExtension.registerTag("customtag") { parser, token in
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return ErrorNode(token: token)
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}
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environment.extensions += [tagExtension]
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let error = expectedSyntaxError(token: "customtag", template: template, description: "Custom Error")
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try expect(try environment.renderTemplate(string: template.templateString, context: ["array": ["a"]])).toThrow(error)
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}
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}
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$0.context("given related templates") {
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let path = Path(#file) + ".." + "fixtures"
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let loader = FileSystemLoader(paths: [path])
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let environment = Environment(loader: loader)
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$0.it("reports syntax error in included template") {
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let template: Template = "{% include \"invalid-include.html\"%}"
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environment.errorReporter.context = ErrorReporterContext(template: template)
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let context = Context(dictionary: ["target": "World"], environment: environment)
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let includedTemplate = try environment.loadTemplate(name: "invalid-include.html")
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let error = expectedSyntaxError(token: "target|unknown", template: includedTemplate, description: "Unknown filter 'unknown'")
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try expect(try template.render(context)).toThrow(error)
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}
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$0.it("reports syntax error in extended template") {
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let template = try environment.loadTemplate(name: "invalid-child-super.html")
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let context = Context(dictionary: ["target": "World"], environment: environment)
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let baseTemplate = try environment.loadTemplate(name: "invalid-base.html")
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let error = expectedSyntaxError(token: "target|unknown", template: baseTemplate, description: "Unknown filter 'unknown'")
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try expect(try template.render(context)).toThrow(error)
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}
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}
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}
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}
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fileprivate class ExampleLoader: Loader {
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func loadTemplate(name: String, environment: Environment) throws -> Template {
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if name == "example.html" {
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return Template(templateString: "Hello World!", environment: environment, name: name)
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}
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throw TemplateDoesNotExist(templateNames: [name], loader: self)
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}
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}
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class CustomTemplate: Template {
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override func render(_ dictionary: [String: Any]? = nil) throws -> String {
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return "here"
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}
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}
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