James Strachan
52 lines
1.3 KiB
Kotlin
52 lines
1.3 KiB
Kotlin
package template.experiment4
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import junit.framework.TestCase
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import kotlin.test.assertEquals
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import kotlin.test.todo
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/**
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* Creates a string template from some constant string expressions and some dynamic expressions.
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*/
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class StringTemplate<T>(val constantText : Array<String>, val fn : (T) -> Unit) {
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}
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fun StringBuilder.text(value : String) : Unit {
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this.append(value)
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}
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fun StringBuilder.expression(value : Any?) : Unit {
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this.append(value)
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}
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/**
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* Converts a [[StringTemplate]] to a String
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*/
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fun toString(template : StringTemplate<StringBuilder>) : String {
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val builder = StringBuilder()
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template.fn(builder)
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return builder.toString() ?: ""
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}
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class StringTemplateTest : TestCase() {
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fun testTemplate() : Unit {
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val name = "James"
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// Code generated by the following template expression:
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//
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// val actual = "hello $name!"
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val template = StringTemplate<StringBuilder>(array("hello ", "!"), { (it : StringBuilder) ->
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println("About to apply function!")
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it.text("hello ")
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it.expression(name)
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it.text("!")
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})
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println("Template has constants ${template.constantText.toList()} and function ${template.fn}")
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todo {
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val actual = toString(template)
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assertEquals("hello James!", actual)
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}
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}
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} |