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IfStatementTests.cs
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IfStatementTests.cs
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using System.Collections.Generic;
using System.IO;
using System.Text.Encodings.Web;
using System.Threading.Tasks;
using Fluid.Ast;
using Fluid.Values;
using Xunit;
namespace Fluid.Tests
{
public class IfStatementTests
{
private static List<Statement> TEXT(string text)
{
return new List<Statement> { new TextSpanStatement(text) };
}
private static Expression BooleanExpression(bool value, bool async)
{
var boolean = BooleanValue.Create(value);
return async ? new AwaitedExpression(boolean) : new LiteralExpression(boolean);
}
[Theory]
[InlineData(true)]
[InlineData(false)]
public async Task IfCanProcessWhenTrue(bool async)
{
var e = new IfStatement(
BooleanExpression(true, async),
new List<Statement> { new TextSpanStatement("x") }
);
var sw = new StringWriter();
await e.WriteToAsync(sw, HtmlEncoder.Default, new TemplateContext());
Assert.Equal("x", sw.ToString());
}
[Theory]
[InlineData(true)]
[InlineData(false)]
public async Task IfDoesntProcessWhenFalse(bool async)
{
var e = new IfStatement(
BooleanExpression(false, async),
new List<Statement> { new TextSpanStatement("x") }
);
var sw = new StringWriter();
await e.WriteToAsync(sw, HtmlEncoder.Default, new TemplateContext());
Assert.Equal("", sw.ToString());
}
[Theory]
[InlineData(true)]
[InlineData(false)]
public async Task IfDoesntProcessElseWhenTrue(bool async)
{
var e = new IfStatement(
BooleanExpression(true, async),
new List<Statement> {
new TextSpanStatement("x")
},
new ElseStatement(new List<Statement> {
new TextSpanStatement("y")
}));
var sw = new StringWriter();
await e.WriteToAsync(sw, HtmlEncoder.Default, new TemplateContext());
Assert.Equal("x", sw.ToString());
}
[Theory]
[InlineData(true)]
[InlineData(false)]
public async Task IfProcessElseWhenFalse(bool async)
{
var e = new IfStatement(
BooleanExpression(false, async),
new List<Statement> {
new TextSpanStatement("x")
},
new ElseStatement(new List<Statement> {
new TextSpanStatement("y")
})
);
var sw = new StringWriter();
await e.WriteToAsync(sw, HtmlEncoder.Default, new TemplateContext());
Assert.Equal("y", sw.ToString());
}
[Theory]
[InlineData(true)]
[InlineData(false)]
public async Task IfProcessElseWhenNoOther(bool async)
{
var e = new IfStatement(
BooleanExpression(false, async),
TEXT("a"),
new ElseStatement(TEXT("b")),
new List<ElseIfStatement> { new ElseIfStatement(BooleanExpression(false, async), TEXT("c")) }
);
var sw = new StringWriter();
await e.WriteToAsync(sw, HtmlEncoder.Default, new TemplateContext());
Assert.Equal("b", sw.ToString());
}
[Theory]
[InlineData(true)]
[InlineData(false)]
public async Task IfProcessElseIf(bool async)
{
var e = new IfStatement(
BooleanExpression(false, async),
TEXT("a"),
new ElseStatement(TEXT("b")),
new List<ElseIfStatement> { new ElseIfStatement(BooleanExpression(true, async), TEXT("c")) }
);
var sw = new StringWriter();
await e.WriteToAsync(sw, HtmlEncoder.Default, new TemplateContext());
Assert.Equal("c", sw.ToString());
}
[Theory]
[InlineData(true)]
[InlineData(false)]
public async Task IfProcessMultipleElseIf(bool async)
{
var e = new IfStatement(
BooleanExpression(false, async),
TEXT("a"),
new ElseStatement(TEXT("b")),
new List<ElseIfStatement> {
new ElseIfStatement(BooleanExpression(false, async), TEXT("c")),
new ElseIfStatement(BooleanExpression(true, async), TEXT("d"))}
);
var sw = new StringWriter();
await e.WriteToAsync(sw, HtmlEncoder.Default, new TemplateContext());
Assert.Equal("d", sw.ToString());
}
[Theory]
[InlineData(true)]
[InlineData(false)]
public async Task IfProcessFirstElseIf(bool async)
{
var e = new IfStatement(
BooleanExpression(false, async),
TEXT("a"),
new ElseStatement(TEXT("b")),
new List<ElseIfStatement> {
new ElseIfStatement(BooleanExpression(true, async), TEXT("c")),
new ElseIfStatement(BooleanExpression(true, async), TEXT("d"))}
);
var sw = new StringWriter();
await e.WriteToAsync(sw, HtmlEncoder.Default, new TemplateContext());
Assert.Equal("c", sw.ToString());
}
[Theory]
[InlineData(true)]
[InlineData(false)]
public async Task IfProcessNoMatchElseIf(bool async)
{
var e = new IfStatement(
BooleanExpression(false, async: false),
TEXT("a"),
null,
new List<ElseIfStatement> {
new ElseIfStatement(BooleanExpression(false, async), TEXT("c")),
new ElseIfStatement(BooleanExpression(false, async), TEXT("d"))}
);
var sw = new StringWriter();
await e.WriteToAsync(sw, HtmlEncoder.Default, new TemplateContext());
Assert.Equal("", sw.ToString());
}
[Theory]
[InlineData(true)]
[InlineData(false)]
public async Task IfProcessAwaitedAndElse(bool async)
{
var e = new IfStatement(
BooleanExpression(false, async: false),
TEXT("a"),
new ElseStatement(TEXT("c")),
new List<ElseIfStatement>
{
new ElseIfStatement(BooleanExpression(false, async), TEXT("b"))
}
);
var sw = new StringWriter();
await e.WriteToAsync(sw, HtmlEncoder.Default, new TemplateContext());
Assert.Equal("c", sw.ToString());
}
}
sealed class AwaitedExpression : Expression
{
private readonly FluidValue _result;
public AwaitedExpression(FluidValue result)
{
_result = result;
}
public override async ValueTask<FluidValue> EvaluateAsync(TemplateContext context)
{
await Task.Delay(10);
return _result;
}
}
}