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MariusStorhaugMariusStorhaug
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Add tests for handling various YAML data types and structures in ConvertFrom-Yaml and ConvertTo-Yaml
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Lines changed: 444 additions & 10 deletions

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‎tests/ConvertFrom-Yaml.Tests.ps1‎

Lines changed: 210 additions & 10 deletions
Original file line numberDiff line numberDiff line change
@@ -91,6 +91,74 @@ f: OFF
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$result = 'value: "line1\nline2\ttab"' | ConvertFrom-Yaml
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$result.value | Should -Be "line1`nline2`ttab"
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}
94+
95+
It 'Handles all supported double-quoted escapes (\r, \\, \", \0)' {
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$result = 'cr: "a\rb"' | ConvertFrom-Yaml
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$result.cr | Should -Be "a`rb"
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$result = 'bs: "a\\b"' | ConvertFrom-Yaml
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$result.bs | Should -Be 'a\b'
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$result = 'dq: "she said \"hi\""' | ConvertFrom-Yaml
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$result.dq | Should -Be 'she said "hi"'
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$result = 'nul: "a\0b"' | ConvertFrom-Yaml
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$result.nul | Should -Be "a$([char]0)b"
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}
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It 'Preserves single-quoted escape (double apostrophe)' {
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$result = "value: 'it''s a test'" | ConvertFrom-Yaml
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$result.value | Should -Be "it's a test"
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}
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It 'Parses a negative integer' {
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$result = 'value: -7' | ConvertFrom-Yaml
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$result.value | Should -Be -7
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$result.value | Should -BeOfType [int]
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}
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It 'Parses a large integer as [long]' {
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$result = 'value: 3000000000' | ConvertFrom-Yaml
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$result.value | Should -Be 3000000000
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$result.value | Should -BeOfType [long]
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}
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It 'Parses a negative floating-point value' {
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$result = 'value: -3.14' | ConvertFrom-Yaml
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$result.value | Should -Be -3.14
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$result.value | Should -BeOfType [double]
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}
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It 'Parses scientific notation as a double' {
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$result = 'value: 6.022e23' | ConvertFrom-Yaml
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$result.value | Should -Be 6.022e23
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$result.value | Should -BeOfType [double]
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}
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It 'Parses zero as an integer' {
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$result = 'value: 0' | ConvertFrom-Yaml
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$result.value | Should -Be 0
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$result.value | Should -BeOfType [int]
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}
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It 'Parses leading-zero integer as a number (YAML 1.2.2 core schema)' {
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$result = 'value: 01' | ConvertFrom-Yaml
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$result.value | Should -Be 1
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$result.value | Should -BeOfType [int]
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}
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It 'Parses leading-plus integer as a number (YAML 1.2.2 core schema)' {
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$result = 'value: +42' | ConvertFrom-Yaml
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$result.value | Should -Be 42
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$result.value | Should -BeOfType [int]
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}
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It 'Returns empty/whitespace-only input as null' {
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$result = '' | ConvertFrom-Yaml
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$result | Should -BeNullOrEmpty
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$result = ' ' | ConvertFrom-Yaml
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$result | Should -BeNullOrEmpty
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}
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}
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Context 'Mappings' {
@@ -171,6 +239,44 @@ GetType: world
171239
$result.PSObject.Properties['ToString'].Value | Should -Be 'hello'
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$result.PSObject.Properties['GetType'].Value | Should -Be 'world'
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}
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It 'Parses a mapping with null values' {
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$yaml = @'
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present: value
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empty:
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tilde: ~
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explicit: null
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'@
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$result = $yaml | ConvertFrom-Yaml
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$result.present | Should -Be 'value'
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$result.empty | Should -BeNullOrEmpty
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$result.tilde | Should -BeNullOrEmpty
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$result.explicit | Should -BeNullOrEmpty
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}
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It 'Parses a mapping with mixed value types' {
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$yaml = @'
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str: hello
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int: 10
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float: 2.5
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bool: true
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nothing: null
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list:
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- a
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- b
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child:
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key: val
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'@
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$result = $yaml | ConvertFrom-Yaml
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$result.str | Should -Be 'hello'
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$result.str | Should -BeOfType [string]
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$result.int | Should -Be 10
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$result.float | Should -Be 2.5
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$result.bool | Should -BeTrue
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$result.nothing | Should -BeNullOrEmpty
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$result.list.Count | Should -Be 2
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$result.child.key | Should -Be 'val'
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}
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}
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176282
Context 'Sequences' {
@@ -211,6 +317,55 @@ people:
211317
$result.people[0].name | Should -Be 'Alice'
212318
$result.people[1].age | Should -Be 25
213319
}
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It 'Parses nested sequences (sequence of sequences)' {
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$yaml = @'
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matrix:
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-
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- 1
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- 2
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-
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- 3
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- 4
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'@
331+
$result = $yaml | ConvertFrom-Yaml
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$result.matrix.Count | Should -Be 2
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$result.matrix[0].Count | Should -Be 2
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$result.matrix[0][0] | Should -Be 1
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$result.matrix[1][1] | Should -Be 4
336+
}
337+
338+
It 'Parses a sequence with null items' {
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$yaml = @'
340+
- alpha
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-
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- bravo
343+
'@
344+
$result = $yaml | ConvertFrom-Yaml -NoEnumerate
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$result.Count | Should -Be 3
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$result[0] | Should -Be 'alpha'
347+
$result[1] | Should -BeNullOrEmpty
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$result[2] | Should -Be 'bravo'
349+
}
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It 'Parses a sequence with mixed scalar types' {
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$yaml = @'
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- hello
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- 42
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- true
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- 3.14
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- null
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'@
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$result = $yaml | ConvertFrom-Yaml -NoEnumerate
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$result[0] | Should -Be 'hello'
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$result[0] | Should -BeOfType [string]
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$result[1] | Should -Be 42
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$result[1] | Should -BeOfType [int]
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$result[2] | Should -BeTrue
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$result[3] | Should -Be 3.14
366+
$result[3] | Should -BeOfType [double]
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$result[4] | Should -BeNullOrEmpty
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}
214369
}
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216371
Context '-AsHashtable' {
@@ -246,6 +401,35 @@ outer:
246401
, $result | Should -BeOfType [System.Object[]]
247402
$result.Count | Should -Be 1
248403
}
404+
405+
It 'Without -NoEnumerate, unwraps a single-element top-level sequence' {
406+
$yaml = '- only'
407+
$result = $yaml | ConvertFrom-Yaml
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$result | Should -Be 'only'
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$result | Should -BeOfType [string]
410+
}
411+
}
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Context 'Pipeline input' {
414+
It 'Accepts multi-line pipeline strings (simulating Get-Content)' {
415+
$lines = @('name: Alice', 'age: 30')
416+
$result = $lines | ConvertFrom-Yaml
417+
$result.name | Should -Be 'Alice'
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$result.age | Should -Be 30
419+
}
420+
}
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422+
Context 'Deeply nested structures' {
423+
It 'Parses 4 levels of nesting' {
424+
$yaml = @'
425+
a:
426+
b:
427+
c:
428+
d: deep
429+
'@
430+
$result = $yaml | ConvertFrom-Yaml
431+
$result.a.b.c.d | Should -Be 'deep'
432+
}
249433
}
250434

251435
Context 'Document markers' {
@@ -264,6 +448,16 @@ age: 30
264448
$yaml = @'
265449
name: Alice
266450
...
451+
'@
452+
$result = $yaml | ConvertFrom-Yaml
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$result.name | Should -Be 'Alice'
454+
}
455+
456+
It 'Tolerates both --- and ... markers together' {
457+
$yaml = @'
458+
---
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name: Alice
460+
...
267461
'@
268462
$result = $yaml | ConvertFrom-Yaml
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$result.name | Should -Be 'Alice'
@@ -288,13 +482,23 @@ age: 30
288482
$result.name | Should -Be 'Alice'
289483
}
290484

291-
It 'Ignores blank lines' {
292-
$yaml = @'
293-
name: Alice
485+
It 'Preserves # inside double-quoted strings' {
486+
$result = 'value: "has # inside"' | ConvertFrom-Yaml
487+
$result.value | Should -Be 'has # inside'
488+
}
294489

295-
age: 30
490+
It 'Preserves # inside single-quoted strings' {
491+
$result = "value: 'has # inside'" | ConvertFrom-Yaml
492+
$result.value | Should -Be 'has # inside'
493+
}
296494

297-
'@
495+
It 'Does not treat # without leading space as an inline comment' {
496+
$result = 'channel: news#general' | ConvertFrom-Yaml
497+
$result.channel | Should -Be 'news#general'
498+
}
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500+
It 'Ignores blank lines' {
501+
$yaml = "name: Alice`n`nage: 30`n"
298502
$result = $yaml | ConvertFrom-Yaml
299503
$result.name | Should -Be 'Alice'
300504
$result.age | Should -Be 30
@@ -352,11 +556,7 @@ a:
352556
}
353557

354558
It 'Parses sequence items {} and [] correctly' {
355-
$yaml = @'
356-
- {}
357-
- []
358-
- hello
359-
'@
559+
$yaml = "- {}`n- []`n- hello"
360560
$result = $yaml | ConvertFrom-Yaml -NoEnumerate -AsHashtable
361561
$result[0] | Should -BeOfType [System.Collections.Specialized.OrderedDictionary]
362562
$result[0].Count | Should -Be 0

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