validate the source number mapping with snapshots

Author: douira

glsl-preprocessor/src/test/java/io/github/douira/glsl_preprocessor/IntegrationTest.java

@@ -41,20 +41,33 @@ private void preprocessorTestCase(String type, String input, String expectedOutp
 			prepare.accept(pp);
 		}
 
-		var snapshotOutput = "(no error)";
+		var snapshotOutput = new StringBuilder();
 		if (errors) {
 			var e = assertThrows(Exception.class, pp::printToString);
 			pp.close();
-			snapshotOutput = e.toString();
+			snapshotOutput.append(e.toString());
 		} else {
 			var output = pp.printToString();
 			assertEquals(expectedOutput, output);
+			snapshotOutput.append("(no error)");
+		}
+		
+		for (var entry : pp.getSourceNumbers().entrySet()) {
+			var source = entry.getKey();
+			if (source == null) {
+				continue;
+			}
+			var sourceNumber = entry.getValue();
+			snapshotOutput.append("\n");
+			snapshotOutput.append(sourceNumber);
+			snapshotOutput.append("->");
+			snapshotOutput.append(source);
 		}
 
 		expect
 				.scenario(type + "_" + getBase64Hash(input))
 				.toMatchSnapshot(SnapshotUtil.inputOutputSnapshot(
-						input, snapshotOutput));
+						input, snapshotOutput.toString()));
 	}
 
 	@SnapshotName("testPreprocessor")

glsl-preprocessor/src/test/java/io/github/douira/glsl_preprocessor/__snapshots__/IntegrationTest.cases

@@ -123,6 +123,48 @@ content 1
 #line 3 0
 foo
 
+§testIncludeLineMapping LINE_MARKERS:
+bar
+#include "length!2:a"
+baz
+#include "length!2:a"
+foo
+
+===
+#line 1 0
+bar
+#line 1 1
+content 0
+content 1
+#line 3 0
+baz
+#line 1 1
+content 0
+content 1
+#line 5 0
+foo
+
+§testIncludeLineMapping LINE_MARKERS:
+bar
+#include "length!2:a"
+baz
+#include "length!2:b"
+foo
+
+===
+#line 1 0
+bar
+#line 1 1
+content 0
+content 1
+#line 3 0
+baz
+#line 1 2
+content 0
+content 1
+#line 5 0
+foo
+
 §testIncludeLineMapping LINE_MARKERS,NAMED_LINE_MARKERS:
 bar
 #include "length!2:a"

glsl-preprocessor/src/test/java/io/github/douira/glsl_preprocessor/__snapshots__/IntegrationTest.snap

@@ -63,13 +63,41 @@ foo
 ]
 
 
+testIncludeLineMapping[LINE_MARKERS_KMXHA9leEtjEQjB1tipNUWRHgsw]=[
+bar
+#include "length!2:a"
+baz
+#include "length!2:b"
+foo
+
+<><><><><><><><><><><><><><><><><><><><><><><><><>
+(no error)
+1->length!2:a
+2->length!2:b
+]
+
+
 testIncludeLineMapping[LINE_MARKERS_dSPMsT7XryDyTsdqDoJrH6BH3Zo]=[
 bar
 #include "length!2:a"
 foo
 
 <><><><><><><><><><><><><><><><><><><><><><><><><>
 (no error)
+1->length!2:a
+]
+
+
+testIncludeLineMapping[LINE_MARKERS_x+AzR2u8DVoryMYAQ2zIR24fhCk]=[
+bar
+#include "length!2:a"
+baz
+#include "length!2:a"
+foo
+
+<><><><><><><><><><><><><><><><><><><><><><><><><>
+(no error)
+1->length!2:a
 ]