Parse positive ints

1 files changed, 39 insertions, 0 deletions

diff --git a/src/test/java/org/shedlang/compiler/parser/ParserIntLiteralTests.java b/src/test/java/org/shedlang/compiler/parser/ParserIntLiteralTests.java
new file mode 100644
index 00000000..61908772
--- /dev/null
+++ b/src/test/java/org/shedlang/compiler/parser/ParserIntLiteralTests.java
@@ -0,0 +1,39 @@
+package org.shedlang.compiler.parser;
+
+import org.junit.jupiter.api.Test;
+
+import static org.shedlang.compiler.ast.untyped.UntypedNodeMatchers.isUntypedIntLiteralNode;
+import static org.shedlang.compiler.parser.ParserTesting.parseString;
+import static org.zwobble.precisely.AssertThat.assertThat;
+
+public class ParserIntLiteralTests {
+    // TODO: negatives
+    // TODO: forbid leading zeroes?
+
+    @Test
+    public void canParseZero() {
+        var source = "0";
+
+        var node = parseString(source, Parser::parseTopLevelExpression);
+
+        assertThat(node, isUntypedIntLiteralNode(0));
+    }
+
+    @Test
+    public void canParseSingleDigitPositiveInt() {
+        var source = "7";
+
+        var node = parseString(source, Parser::parseTopLevelExpression);
+
+        assertThat(node, isUntypedIntLiteralNode(7));
+    }
+
+    @Test
+    public void canParseManyDigitPositiveInt() {
+        var source = "723";
+
+        var node = parseString(source, Parser::parseTopLevelExpression);
+
+        assertThat(node, isUntypedIntLiteralNode(723));
+    }
+}