Class: SchemaTest::FingerprintRewriter

Inherits:
Object
  • Object
show all
Defined in:
lib/schema_test/fingerprint_rewriter.rb

Overview

Rewrites ‘assert_valid_json_for_schema` calls in test files so that they carry an up-to-date `fingerprint:` argument matching the compiled schema. This means a schema change shows up as a diff in the test files themselves, pointing at exactly which API endpoints changed, and lets the assertion verify the fingerprint at runtime.

The call site reported at runtime is the line the call starts on, which for a multi-line call is the line with the opening paren. The rewriter therefore scans forward to find the matching closing paren before inserting or replacing the argument.

Constant Summary collapse

FINGERPRINT_ARGUMENT = 
/fingerprint:\s*("(?:[^"\\]|\\.)*"|'(?:[^'\\]|\\.)*'|[^\s,)]+)/

Instance Method Summary collapse

Constructor Details

#initialize(contents, line_indexes_with_fingerprints) ⇒ FingerprintRewriter

Returns a new instance of FingerprintRewriter.



15
16
17
18
 
# File 'lib/schema_test/fingerprint_rewriter.rb', line 15

def initialize(contents, line_indexes_with_fingerprints)
  @lines = contents.split("\n")
  @line_indexes_with_fingerprints = line_indexes_with_fingerprints
end

Instance Method Details

#output ⇒ Object 



20
21
22
23
24
25
26
 
# File 'lib/schema_test/fingerprint_rewriter.rb', line 20

def output
  @line_indexes_with_fingerprints.each do |start_index, fingerprint|
    next unless @lines[start_index]
    annotate_call(start_index, fingerprint)
  end
  @lines.join("\n") + "\n"
end