Add tests for BigInt emitter (#4165)

google · May 28, 2024 · 6e5ce38 · 6e5ce38
1 parent 3ae8acd
commit 6e5ce38
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Showing 3 changed files with 43 additions and 4 deletions.
diff --git a/src/com/google/javascript/jscomp/CodeConsumer.java b/src/com/google/javascript/jscomp/CodeConsumer.java
@@ -371,7 +371,6 @@ void addNumber(double x, Node n) {
   void addBigInt(BigInteger bi) {
     String hexEncoded = "0x" + bi.toString(16) + "n";
     String decimalEncoded = bi.toString() + "n";
-    // The exact threshold is when bi >= 10n ** 17n
     addConstant(hexEncoded.length() < decimalEncoded.length() ? hexEncoded : decimalEncoded);
   }
 

diff --git a/test/com/google/javascript/jscomp/CodePrinterTest.java b/test/com/google/javascript/jscomp/CodePrinterTest.java
@@ -29,6 +29,7 @@
 import com.google.javascript.rhino.Token;
 import java.util.ArrayList;
 import java.util.List;
+import java.util.function.Function;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.junit.runners.JUnit4;
@@ -47,6 +48,39 @@ public void testBigInt() {
     assertPrint("-0b110n", "-6n");
     assertPrint("-0o7n", "-7n");
     assertPrint("-0x8n", "-8n");
+    assertPrintSame("1000000000n");
+    assertPrintSame("-10000000000n");
+
+    // Normalize the results to lowercase so the tests do not enfore the output is lowercase but
+    // instead the capitalization is left to the compiler.
+    Function<String, String> normalizeBigInt = s ->
+        s.substring(0, s.length() - 1).toLowerCase() + s.substring(s.length() - 1);
+    assertPrintAfterNormalization(
+        "7182582809266874004429817360811601465721521679690913024666851123813995272999n",
+        "0xfe132a356ec5f9279946c8fdf29780abd0387a8277e811069d174660b385b27n",
+        normalizeBigInt);
+    assertPrintAfterNormalization(
+        "0x000000fe132a356ec5f9279946c8fdf29780abd0387a8277e811069d174660b385b27n",
+        "0xfe132a356ec5f9279946c8fdf29780abd0387a8277e811069d174660b385b27n",
+        normalizeBigInt);
+    assertPrintAfterNormalization(
+        "-7182582809266874004429817360811601465721521679690913024666851123813995272999n",
+        "-0xfe132a356ec5f9279946c8fdf29780abd0387a8277e811069d174660b385b27n",
+        normalizeBigInt);
+    assertPrintAfterNormalization(
+        "-0o00774114521526730576223631215443757451360052750070365011677201040647213506301316055447n",
+        "-0xfe132a356ec5f9279946c8fdf29780abd0387a8277e811069d174660b385b27n",
+        normalizeBigInt);
+    assertPrintAfterNormalization(
+        "0o774114521526730576223631215443757451360052750070365011677201040647213506301316055447n",
+        "0xfe132a356ec5f9279946c8fdf29780abd0387a8277e811069d174660b385b27n",
+        normalizeBigInt);
+    assertPrintAfterNormalization(
+        "0b111111100001001100101010001101010110111011000101111110010010011110011001010001101100100" +
+            "0111111011111001010010111100000001010101111010000001110000111101010000010011101111110" +
+            "10000001000100000110100111010001011101000110011000001011001110000101101100100111n",
+        "0xfe132a356ec5f9279946c8fdf29780abd0387a8277e811069d174660b385b27n",
+        normalizeBigInt);
   }
 
   @Test

diff --git a/test/com/google/javascript/jscomp/CodePrinterTestBase.java b/test/com/google/javascript/jscomp/CodePrinterTestBase.java
@@ -24,6 +24,7 @@
 import com.google.javascript.jscomp.parsing.Config;
 import com.google.javascript.rhino.Node;
 import java.nio.charset.Charset;
+import java.util.function.Function;
 import org.jspecify.nullness.Nullable;
 import org.junit.Before;
 
@@ -166,10 +167,11 @@ void assertPrettyPrintNode(String expectedJs, Node ast) {
     assertThat(prettyPrintNode(ast)).isEqualTo(expectedJs);
   }
 
-  protected void assertPrint(String js, String expected) {
+  protected void assertPrintAfterNormalization(String js, String expected,
+      Function<String, String> normalize) {
     parse(expected); // validate the expected string is valid JS
     assertThat(
-            parsePrint(
+            normalize.apply(parsePrint(
                 js,
                 newCompilerOptions(
                     new CompilerOptionBuilder() {
@@ -179,10 +181,14 @@ void setOptions(CompilerOptions options) {
                         options.setLineLengthThreshold(
                             CompilerOptions.DEFAULT_LINE_LENGTH_THRESHOLD);
                       }
-                    })))
+                    }))))
         .isEqualTo(expected);
   }
 
+  protected void assertPrint(String js, String expected) {
+    assertPrintAfterNormalization(js, expected, Function.identity());
+  }
+
   protected void assertPrintSame(String js) {
     assertPrint(js, js);
   }