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Merge pull request #20 from jvanderwee/task/zip_tests

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Add tests for zip functions
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Michael Bull 2020-06-10 14:06:08 +01:00 committed by GitHub
commit f8ce59b3fb
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src/test/kotlin/com/github/michaelbull/result/ZipTest.kt Normal file
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package com.github.michaelbull.result
import kotlin.test.Test
import kotlin.test.assertEquals
class ZipTest {
data class ZipData3(val a: String, val b: Int, val c: Boolean)
data class ZipData4(val a: String, val b: Int, val c: Boolean, val d: Double)
data class ZipData5(val a: String, val b: Int, val c: Boolean, val d: Double, val e: Char)
class Zip {
@Test
fun returnsTransformedValueIfBothOk() {
val result = zip(
{ Ok(10) },
{ Ok(20) },
Int::plus
)
result as Ok
assertEquals(
expected = 30,
actual = result.value
)
}
@Test
fun returnsErrIfOneOfTwoErr() {
val result = zip(
{ Ok(10) },
{ Ok(20).and { Err("hello") } },
Int::plus
)
result as Err
assertEquals(
expected = "hello",
actual = result.error
)
}
@Test
fun returnsFirstErrIfBothErr() {
val result = zip(
{ Ok(10).and { Err("foo") } },
{ Ok(20).and { Err("bar") } },
Int::plus
)
result as Err
assertEquals(
expected = "foo",
actual = result.error
)
}
@Test
fun returnsTransformedValueIfThreeOk() {
val result = zip(
{ Ok("hello") },
{ Ok(2) },
{ Ok(false) },
::ZipData3
)
result as Ok
assertEquals(
expected = ZipData3("hello", 2, false),
actual = result.value
)
}
@Test
fun returnsErrIfOneOfThreeErr() {
val result = zip(
{ Ok("foo") },
{ Ok(1).and { Err("bar") } },
{ Ok(false) },
::ZipData3
)
result as Err
assertEquals(
expected = "bar",
actual = result.error
)
}
@Test
fun returnsFirstErrIfTwoOfThreeErr() {
val result = zip(
{ Ok("foo") },
{ Ok(1).and { Err("bar") } },
{ Ok(false).and { Err("baz") } },
::ZipData3
)
assertEquals(
expected = "bar",
actual = result.getError()
)
}
@Test
fun returnsFirstErrIfAllThreeErr() {
val result = zip(
{ Ok("foo").and { Err(1) } },
{ Ok(1).and { Err(2) } },
{ Ok(false).and { Err(3) } },
::ZipData3
)
result as Err
assertEquals(
expected = 1,
actual = result.error
)
}
@Test
fun returnsTransformedValueIfFourOk() {
val result = zip(
{ Ok("hello") },
{ Ok(2) },
{ Ok(false) },
{ Ok(1.5) },
::ZipData4
)
result as Ok
assertEquals(
expected = ZipData4("hello", 2, false, 1.5),
actual = result.value
)
}
@Test
fun returnsFirstErrIfSomeOfFourErr() {
val result = zip(
{ Ok("hello") },
{ Ok(2).and { Err(1) } },
{ Ok(false) },
{ Ok(1.5).and { Err(2) } },
::ZipData4
)
result as Err
assertEquals(
expected = 1,
actual = result.error
)
}
@Test
fun returnsTransformedValueIfFiveOk() {
val result = zip(
{ Ok("hello") },
{ Ok(2) },
{ Ok(false) },
{ Ok(1.5) },
{ Ok('a') },
::ZipData5
)
result as Ok
assertEquals(
expected = ZipData5("hello", 2, false, 1.5, 'a'),
actual = result.value
)
}
@Test
fun returnsFirstErrIfSomeOfFiveErr() {
val result = zip(
{ Ok("hello").and { Err(1) } },
{ Ok(2) },
{ Ok(false) },
{ Ok(1.5) },
{ Ok('a').and { Err(2) } },
::ZipData5
)
result as Err
assertEquals(
expected = 1,
actual = result.error
)
}
}
}