Add stubbed parser

3 files changed, 68 insertions, 0 deletions

diff --git a/src/test/java/org/shedlang/compiler/parser/ParserNamespaceTests.java b/src/test/java/org/shedlang/compiler/parser/ParserNamespaceTests.java
new file mode 100644
index 00000000..87ebb7e8
--- /dev/null
+++ b/src/test/java/org/shedlang/compiler/parser/ParserNamespaceTests.java
@@ -0,0 +1,22 @@
+package org.shedlang.compiler.parser;
+
+import org.junit.jupiter.api.Test;
+import org.shedlang.compiler.ast.UntypedNamespaceNode;
+
+import static org.shedlang.compiler.parser.ParserTesting.parseString;
+import static org.zwobble.precisely.AssertThat.assertThat;
+import static org.zwobble.precisely.Matchers.instanceOf;
+
+public class ParserNamespaceTests {
+    @Test
+    public void canParseEmptyNamespace() {
+        var source = "";
+
+        var node = parseString(
+            source,
+            Parser::parseNamespace
+        );
+
+        assertThat(node, instanceOf(UntypedNamespaceNode.class));
+    }
+}
diff --git a/src/test/java/org/shedlang/compiler/parser/ParserTesting.java b/src/test/java/org/shedlang/compiler/parser/ParserTesting.java
new file mode 100644
index 00000000..fd420f73
--- /dev/null
+++ b/src/test/java/org/shedlang/compiler/parser/ParserTesting.java
@@ -0,0 +1,23 @@
+package org.shedlang.compiler.parser;
+
+import org.shedlang.compiler.sources.Sources;
+import org.shedlang.compiler.tokeniser.TokenIterator;
+
+import java.util.function.Function;
+
+import static org.shedlang.compiler.parser.Tokeniser.tokenise;
+import static org.zwobble.precisely.AssertThat.assertThat;
+import static org.zwobble.precisely.Matchers.equalTo;
+
+public class ParserTesting {
+    public static <T> T parseString(
+        String sourceContents,
+        Function<TokenIterator<TokenType>, T> parseTokens
+    ) {
+        var source = Sources.file("<string>", sourceContents);
+        var tokens = tokenise(source);
+        var result = parseTokens.apply(tokens);
+        assertThat(tokens.peek().tokenType(), equalTo(TokenType.END));
+        return result;
+    }
+}
diff --git a/src/test/java/org/shedlang/compiler/parser/TokeniserTests.java b/src/test/java/org/shedlang/compiler/parser/TokeniserTests.java
new file mode 100644
index 00000000..038c8ae3
--- /dev/null
+++ b/src/test/java/org/shedlang/compiler/parser/TokeniserTests.java
@@ -0,0 +1,23 @@
+package org.shedlang.compiler.parser;
+
+import org.junit.jupiter.api.Test;
+import org.shedlang.compiler.sources.Sources;
+
+import static org.zwobble.precisely.AssertThat.assertThat;
+import static org.zwobble.precisely.Matchers.equalTo;
+
+public class TokeniserTests {
+    @Test
+    public void whitespaceTokensAreIgnored() {
+        var source = Sources.file("X.shed", """
+            one two three
+            """);
+
+        var result = Tokeniser.tokenise(source);
+
+        assertThat(result.nextValue(TokenType.IDENTIFIER), equalTo("one"));
+        assertThat(result.nextValue(TokenType.IDENTIFIER), equalTo("two"));
+        assertThat(result.nextValue(TokenType.IDENTIFIER), equalTo("three"));
+        assertThat(result.trySkip(TokenType.END), equalTo(true));
+    }
+}