mirror of
https://github.com/typst/typst
synced 2025-05-19 11:35:27 +08:00
182 lines
4.4 KiB
Typst
182 lines
4.4 KiB
Typst
// Test context expressions.
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// Ref: false
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---
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// Test that context body is parsed as atomic expression.
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#let c = [#context "hello".]
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#test(c.children.first().func(), (context none).func())
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#test(c.children.last(), [.])
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---
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// Test that manual construction is forbidden.
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// Error: 2-25 cannot be constructed manually
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#(context none).func()()
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---
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// Test that `here()` yields the context element's location.
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#context test(query(here()).first().func(), (context none).func())
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---
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// Test whether context is retained in nested function.
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#let translate(..args) = args.named().at(text.lang)
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#set text(lang: "de")
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#context test(translate(de: "Inhalt", en: "Contents"), "Inhalt")
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---
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// Test whether context is retained in built-in callback.
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#set text(lang: "de")
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#context test(
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("en", "de", "fr").sorted(key: v => v != text.lang),
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("de", "en", "fr"),
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)
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---
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// Test `locate` + `here`.
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#context test(here().position().y, 10pt)
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---
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// Test `locate`.
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#v(10pt)
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= Introduction <intro>
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#context test(locate(<intro>).position().y, 20pt)
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---
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// Error: 10-25 label `<intro>` does not exist in the document
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#context locate(<intro>)
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---
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= Introduction <intro>
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= Introduction <intro>
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// Error: 10-25 label `<intro>` occurs multiple times in the document
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#context locate(<intro>)
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---
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#v(10pt)
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= Introduction <intro>
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#context test(locate(heading).position().y, 20pt)
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---
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// Error: 10-25 selector does not match any element
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#context locate(heading)
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---
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= Introduction <intro>
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= Introduction <intro>
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// Error: 10-25 selector matches multiple elements
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#context locate(heading)
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---
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// Test `counter`.
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#let c = counter("heading")
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#c.update(2)
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#c.update(n => n + 2)
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#context test(c.get(), (4,))
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#c.update(n => n - 3)
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#context test(c.at(here()), (1,))
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---
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// Test `state.at` outside of context.
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// Error: 2-26 can only be used when context is known
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// Hint: 2-26 try wrapping this in a `context` expression
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// Hint: 2-26 the `context` expression should wrap everything that depends on this function
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#state("key").at(<label>)
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---
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// Test `counter.at` outside of context.
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// Error: 2-28 can only be used when context is known
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// Hint: 2-28 try wrapping this in a `context` expression
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// Hint: 2-28 the `context` expression should wrap everything that depends on this function
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#counter("key").at(<label>)
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---
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// Test `measure`.
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#let f(lo, hi) = context {
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let h = measure[Hello].height
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assert(h > lo)
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assert(h < hi)
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}
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#text(10pt, f(6pt, 8pt))
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#text(20pt, f(13pt, 14pt))
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---
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// Test basic get rule.
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#context test(text.lang, "en")
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#set text(lang: "de")
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#context test(text.lang, "de")
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#text(lang: "es", context test(text.lang, "es"))
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---
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// Test folding.
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#set rect(stroke: red)
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#context {
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test(type(rect.stroke), stroke)
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test(rect.stroke.paint, red)
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}
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#[
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#set rect(stroke: 4pt)
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#context test(rect.stroke, 4pt + red)
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]
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#context test(rect.stroke, stroke(red))
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---
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// We have one collision: `figure.caption` could be both the element and a get
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// rule for the `caption` field, which is settable. We always prefer the
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// element. It's unfortunate, but probably nobody writes
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// `set figure(caption: ..)` anyway.
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#test(type(figure.caption), function)
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#context test(type(figure.caption), function)
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---
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// Error: 10-31 Assertion failed: "en" != "de"
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#context test(text.lang, "de")
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---
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// Error: 15-20 function `text` does not contain field `langs`
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#context text.langs
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---
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// Error: 18-22 function `heading` does not contain field `body`
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#context heading.body
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---
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// Error: 7-11 can only be used when context is known
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// Hint: 7-11 try wrapping this in a `context` expression
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// Hint: 7-11 the `context` expression should wrap everything that depends on this function
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#text.lang
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---
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// Error: 7-12 function `text` does not contain field `langs`
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#text.langs
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---
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// Error: 10-14 function `heading` does not contain field `body`
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#heading.body
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---
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// Test that show rule establishes context.
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#set heading(numbering: "1.")
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#show heading: it => test(
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counter(heading).get(),
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(intro: (1,), back: (2,)).at(str(it.label)),
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)
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= Introduction <intro>
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= Background <back>
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---
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// Test that show rule on non-locatable element allows `query`.
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// Error: 18-47 Assertion failed: 2 != 3
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#show emph: _ => test(query(heading).len(), 3)
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#show strong: _ => test(query(heading).len(), 2)
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= Introduction
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= Background
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*Hi* _there_
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---
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// Test error when captured variable is assigned to.
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#let i = 0
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// Error: 11-12 variables from outside the context expression are read-only and cannot be modified
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#context (i = 1)
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