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Add unit tests for line breaks and simple pairs

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This commit is contained in:
Tim Van Baak 2021-06-09 18:20:23 -07:00
parent 40b031e198
commit 142ea1a9ba
3 changed files with 233 additions and 35 deletions
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16
amanuensis/parser/core.py
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@ -38,14 +38,14 @@ class TextSpan(Renderable):
def __init__(self, innertext: str):
self.innertext = innertext
def __str__(self):
return f"[{self.innertext}]"
def __repr__(self):
return f"<{self.innertext}>"
class LineBreak(Renderable):
"""A line break within a paragraph."""
def __str__(self):
def __repr__(self):
return "<break>"
@ -55,10 +55,10 @@ class SpanContainer(Renderable):
def __init__(self, spans: Spans):
self.spans: Spans = spans
def __str__(self):
def __repr__(self):
return (
f"[{type(self).__name__} "
+ f'{" ".join([str(span) for span in self.spans])}]'
f"<{type(self).__name__} "
+ f'{" ".join([repr(span) for span in self.spans])}>'
)
def recurse(self, renderer: "RenderableVisitor"):
@ -94,9 +94,9 @@ class CitationSpan(SpanContainer):
# abnormal title strings lying around causing trouble.
self.cite_target: str = normalize_title(cite_target)
def __str__(self) -> str:
def __repr__(self) -> str:
return (
f'{{{" ".join([str(span) for span in self.spans])}'
f'{{{" ".join([repr(span) for span in self.spans])}'
+ f":{self.cite_target}}}"
)

76
amanuensis/parser/parsing.py
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@ -34,6 +34,9 @@ def parse_raw_markdown(text: str) -> ParsedArticle:
def parse_paragraph(text: str) -> SpanContainer:
"""
Parses a block of text into a paragraph object.
"""
# Parse the paragraph as a span of text
text = text.strip()
if text and text[0] == "~":
@ -44,19 +47,28 @@ def parse_paragraph(text: str) -> SpanContainer:
def parse_paired_formatting(
text: str,
cite: bool = True,
bold: bool = True,
italic: bool = True,
can_cite: bool = True,
can_bold: bool = True,
can_italic: bool = True,
) -> Spans:
"""
Parses citations, bolds, and italics, which can be nested inside each other.
"""
# Find positions of any paired formatting
first_cite = find_pair(text, "[[", "]]", cite)
first_bold = find_pair(text, "**", "**", bold)
first_italic = find_pair(text, "//", "//", italic)
first_cite = find_pair(text, "[[", "]]") if can_cite else -1
first_bold = find_pair(text, "**", "**") if can_bold else -1
first_italic = find_pair(text, "//", "//") if can_italic else -1
# Load the possible parse handlers into the map
handlers = {}
handlers[first_cite] = lambda: parse_citation(text, bold=bold, italic=italic)
handlers[first_bold] = lambda: parse_bold(text, cite=cite, italic=italic)
handlers[first_italic] = lambda: parse_italic(text, cite=cite, bold=bold)
handlers[first_cite] = lambda: parse_citation(
text, can_bold=can_bold, can_italic=can_italic
)
handlers[first_bold] = lambda: parse_bold(
text, can_cite=can_cite, can_italic=can_italic
)
handlers[first_italic] = lambda: parse_italic(
text, can_cite=can_cite, can_bold=can_bold
)
# If nothing was found, move on to the next parsing step
handlers[-1] = lambda: parse_breaks(text)
# Choose a handler based on the earliest found result
@ -65,15 +77,10 @@ def parse_paired_formatting(
return handlers[first]()
def find_pair(
text: str,
open_tag: str,
close_tag: str,
valid: bool,
) -> int:
# If skipping, return -1
if not valid:
return -1
def find_pair(text: str, open_tag: str, close_tag: str) -> int:
"""
Finds the beginning of a pair of formatting marks.
"""
# If the open tag wasn't found, return -1
first = text.find(open_tag)
if first < 0:
@ -88,9 +95,12 @@ def find_pair(
def parse_citation(
text: str,
bold: bool = True,
italic: bool = True,
can_bold: bool = True,
can_italic: bool = True,
) -> Spans:
"""
Parses text into a citation span.
"""
cite_open = text.find("[[")
if cite_open > -1:
cite_close = text.find("]]", cite_open + 2)
@ -108,7 +118,7 @@ def parse_citation(
inner_split = text_inner.split("|", 1)
text_inner_actual, cite_target = inner_split[0], inner_split[-1]
spans_inner = parse_paired_formatting(
text_inner_actual, cite=False, bold=bold, italic=italic
text_inner_actual, can_cite=False, can_bold=can_bold, can_italic=can_italic
)
citation = CitationSpan(spans_inner, cite_target)
return [*spans_before, citation, *spans_after]
@ -118,9 +128,12 @@ def parse_citation(
def parse_bold(
text: str,
cite: bool = True,
italic: bool = True,
can_cite: bool = True,
can_italic: bool = True,
) -> Spans:
"""
Parses text into a bold span.
"""
bold_open = text.find("**")
if bold_open > -1:
bold_close = text.find("**", bold_open + 2)
@ -131,7 +144,7 @@ def parse_bold(
# Parse inner text minus bold parsing
text_inner = text[bold_open + 2 : bold_close]
spans_inner = parse_paired_formatting(
text_inner, cite=cite, bold=False, italic=italic
text_inner, can_cite=can_cite, can_bold=False, can_italic=can_italic
)
bold = BoldSpan(spans_inner)
return [*spans_before, bold, *spans_after]
@ -141,9 +154,12 @@ def parse_bold(
def parse_italic(
text: str,
cite: bool = True,
bold: bool = True,
can_cite: bool = True,
can_bold: bool = True,
) -> Spans:
"""
Parses text into an italic span.
"""
italic_open = text.find("//")
if italic_open > -1:
italic_close = text.find("//", italic_open + 2)
@ -154,7 +170,7 @@ def parse_italic(
# Parse inner text minus italic parsing
text_inner = text[italic_open + 2 : italic_close]
spans_inner = parse_paired_formatting(
text_inner, cite=cite, bold=bold, italic=False
text_inner, can_cite=can_cite, can_bold=can_bold, can_italic=False
)
italic = ItalicSpan(spans_inner)
return [*spans_before, italic, *spans_after]
@ -163,9 +179,15 @@ def parse_italic(
def parse_breaks(text: str) -> Spans:
"""
Parses intra-paragraph line breaks.
"""
# Parse empty text into nothing
if not text:
return []
# Split on the line break mark appearing at the end of the line
splits: Spans = list(map(TextSpan, text.split("\\\\\n")))
# Put a LineBreak between each TextSpan
spans: Spans = [
splits[i // 2] if i % 2 == 0 else LineBreak()
for i in range(0, 2 * len(splits) - 1)

176
tests/test_parser.py Normal file
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@ -0,0 +1,176 @@
from typing import Sequence
from amanuensis.parser.core import (
TextSpan,
LineBreak,
ParsedArticle,
BodyParagraph,
SignatureParagraph,
BoldSpan,
ItalicSpan,
CitationSpan,
Renderable,
SpanContainer,
RenderableVisitor,
Spans,
)
from amanuensis.parser.helpers import normalize_title, filesafe_title, titlesort
from amanuensis.parser.parsing import (
parse_breaks,
parse_paired_formatting,
parse_paragraph,
parse_raw_markdown,
)
def assert_types(spans: Spans, types: Sequence, loc=None):
"""
Asserts that a span list has the types specified.
Each element in `types` should be either a span type or a list. The first
element of the list is the container type and the remaining elements are the
content types.
"""
assert len(spans) == len(
types
), f"Unexpected type sequence length at loc {loc if loc else 'root'}"
i = -1
for span, span_type in zip(spans, types):
i += 1
i_loc = f"{loc}.{i}" if loc else f"{i}"
if isinstance(span_type, list):
assert isinstance(
span, SpanContainer
), f"Expected a span container at loc {i_loc}"
assert (
len(span.spans) == len(span_type) - 1
), f"Unexpected container size at loc {i_loc}"
assert isinstance(
span, span_type[0]
), f"Unexpected container type at loc {i_loc}"
assert_types(span.spans, span_type[1:], loc=i_loc)
else:
assert isinstance(span, Renderable), f"Expected a span at loc {i_loc}"
assert isinstance(span, span_type), f"Unexpected span type at loc {i_loc}"
def assert_text(spans: Spans, texts: Sequence, loc=None):
"""
Asserts that a span list has the inner text structure specified.
Each element in `texts` should be either a string or a list of the same.
"""
assert len(spans) == len(
texts
), f"Unexpected text sequence length at loc {loc if loc else 'root'}"
i = -1
for span, text in zip(spans, texts):
i += 1
i_loc = f"{loc}.{i}" if loc else f"{i}"
if isinstance(text, str):
assert isinstance(span, TextSpan), f"Expected a text span at loc {i_loc}"
assert span.innertext == text, f"Unexpected text at loc {i_loc}"
elif isinstance(text, list):
assert isinstance(
span, SpanContainer
), f"Expected a span container at loc {i_loc}"
assert_text(span.spans, text, loc=i_loc)
else:
assert isinstance(span, LineBreak), f"Expected a line break at loc {i_loc}"
def test_parse_breaks():
"""Test parsing for intra-pragraph line break"""
text: str
spans: Spans
# Only having a line break does nothing
text = "One\nTwo"
spans: Spans = parse_breaks(text)
assert_types(spans, [TextSpan])
assert_text(spans, [text])
# Having the mark causes the text to be split across it
text = r"One\\" + "\nTwo"
spans: Spans = parse_breaks(text)
assert_types(spans, [TextSpan, LineBreak, TextSpan])
assert_text(spans, ["One", None, "Two"])
# Multiple lines can be broken
text = r"One\\" + "\n" + r"Two\\" + "\nThree"
spans: Spans = parse_breaks(text)
assert_types(spans, [TextSpan, LineBreak, TextSpan, LineBreak, TextSpan])
assert_text(spans, ["One", None, "Two", None, "Three"])
# The mark must be at the end of the line
text = r"One\\ " + "\nTwo"
spans: Spans = parse_breaks(text)
assert_types(spans, (TextSpan,))
assert_text(spans, [text])
def test_simple_single_parse_pairs():
"""Test parsing for bold and italic marks"""
text: str
spans: Spans
# Empty pair marks should parse
text = "****"
spans = parse_paired_formatting(text)
assert_types(spans, [[BoldSpan]])
text = "////"
spans = parse_paired_formatting(text)
assert_types(spans, [[ItalicSpan]])
# Pair marks with text inside should parse
text = "**hello**"
spans = parse_paired_formatting(text)
assert_types(spans, [[BoldSpan, TextSpan]])
assert_text(spans, [["hello"]])
text = "//hello//"
spans = parse_paired_formatting(text)
assert_types(spans, [[ItalicSpan, TextSpan]])
assert_text(spans, [["hello"]])
# Text outside of pair marks should parse on the same level
text = "**hello** world"
spans = parse_paired_formatting(text)
assert_types(spans, [[BoldSpan, TextSpan], TextSpan])
assert_text(spans, [["hello"], " world"])
text = "//hello// world"
spans = parse_paired_formatting(text)
assert_types(spans, [[ItalicSpan, TextSpan], TextSpan])
assert_text(spans, [["hello"], " world"])
# Text before, between, and after pair marks should parse
text = "In the **beginning** was //the// Word"
spans = parse_paired_formatting(text)
assert_types(
spans,
[TextSpan, [BoldSpan, TextSpan], TextSpan, [ItalicSpan, TextSpan], TextSpan],
)
assert_text(spans, ["In the ", ["beginning"], " was ", ["the"], " Word"])
def test_simple_nested_parse_pairs():
"""Test parsing for nesting bold and italic"""
text: str
spans: Spans
# Simple nested test cases
text = "**//hello//**"
spans = parse_paired_formatting(text)
assert_types(spans, [[BoldSpan, [ItalicSpan, TextSpan]]])
assert_text(spans, [[["hello"]]])
text = "//**world**//"
spans = parse_paired_formatting(text)
assert_types(spans, [[ItalicSpan, [BoldSpan, TextSpan]]])
assert_text(spans, [[["world"]]])
# Overlap should only parse the first
text = "**Hello//world**//"
spans = parse_paired_formatting(text)
assert_types(spans, [[BoldSpan, TextSpan], TextSpan])
assert_text(spans, [["Hello//world"], "//"])