chore: add integration tests and update .gitignore

.gitignore

@@ -1,14 +1,62 @@
+# Binaries and compiled files
 *.bin
+*.exe
+*.so
+*.dll
+*.dylib
+*.o
+*.a
 /ez
+
+# Build directories
 dist/
-context
-*.txt
-tmp/
+bin/
+build/
+out/
+
+# Coverage and profiling
+*.out
+*.html
+*.prof
+*.test
+
+# IDE and editors
+.idea/
+.vscode/
+*.swp
+*.swo
+*~
+.project
+.settings/
+*.sublime-project
+*.sublime-workspace
+
+# OS files
 .DS_Store
+Thumbs.db
+
+# Temp and logs
+tmp/
+*.log
+*.tmp
+
+# Environment and secrets
+.env
+.env.*
+*.pem
+*.key
+
+# Project specific
+context/
+*.txt
+*.ezdb
+
+# Ignore JSON files except examples/json/data.json
+*.json
+!examples/json/data.json
 
 # Ignore all .ez files by default (for local scratch/testing)
 *.ez
-coverage.out
 
 # Keep tests and examples tracked
 !integration-tests/

integration-tests/fail/errors/E1017_unclosed_raw_string.ez

@@ -0,0 +1,9 @@
+/*
+ * Error Test: E1017 - unclosed-raw-string
+ * Expected: "unclosed raw string literal"
+ */
+
+do main() {
+    temp s string = `this raw string never ends
+}
+

integration-tests/fail/errors/E2010_using_before_import.ez

@@ -0,0 +1,13 @@
+/*
+ * Error Test: E2010 - using-before-import
+ * Expected: "cannot use module before importing"
+ */
+
+using math  // using before import
+
+import @math
+
+do main() {
+    println("test")
+}
+

integration-tests/fail/errors/E2027_integer_parse_error.ez

@@ -0,0 +1,9 @@
+/*
+ * Error Test: E2027 - integer-parse-error
+ * Expected: "cannot parse" or "parse" or "integer"
+ */
+
+do main() {
+    temp x int = 0xGG  // invalid hex integer
+}
+

integration-tests/fail/errors/E2044_when_float_not_allowed.ez

@@ -0,0 +1,14 @@
+/*
+ * Error Test: E2044 - when-float-not-allowed
+ * Expected: "float type not allowed in when statement"
+ */
+
+do main() {
+    temp x float = 3.14
+    when x {
+        is 1.0 { println("one") }
+        is 2.0 { println("two") }
+        default { println("other") }
+    }
+}
+

integration-tests/fail/errors/E2053_type_definition_in_function.ez

@@ -0,0 +1,12 @@
+/*
+ * Error Test: E2053 - type-definition-in-function
+ * Expected: "type definitions must be at file level"
+ */
+
+do main() {
+    struct Person {  // type definition inside function
+        name string
+    }
+    temp p Person = Person{name: "Alice"}
+}
+

integration-tests/fail/errors/E3029_float_enum_map_key.ez

@@ -0,0 +1,14 @@
+/*
+ * Error Test: E3029 - float-enum-map-key
+ * Expected: "float-based enum cannot be used as map key"
+ */
+
+enum Status [float] {
+    ACTIVE = 1.0,
+    INACTIVE = 2.0
+}
+
+do main() {
+    temp m map[Status: string] = {}  // float enum as map key
+}
+

integration-tests/fail/errors/E3034_any_type_not_allowed.ez

@@ -0,0 +1,9 @@
+/*
+ * Error Test: E3034 - any-type-not-allowed
+ * Expected: "'any' type is reserved for internal use"
+ */
+
+do main() {
+    temp x any = 42  // 'any' type is reserved
+}
+

integration-tests/fail/errors/E4005_undefined_module_member.ez

@@ -0,0 +1,11 @@
+/*
+ * Error Test: E4005 - undefined-module-member
+ * Expected: "not found in module"
+ */
+
+import @math
+
+do main() {
+    temp x int = math.nonexistent_function()  // Function doesn't exist
+}
+

integration-tests/fail/errors/E4007_module_not_imported.ez

@@ -0,0 +1,9 @@
+/*
+ * Error Test: E4007 - module-not-imported
+ * Expected: "module not imported"
+ */
+
+do main() {
+    temp x int = math.abs(-5)  // Using math without importing
+}
+

integration-tests/fail/errors/E4015_shadows_used_module_function.ez

@@ -0,0 +1,12 @@
+/*
+ * Error Test: E4015 - shadows-used-module-function
+ * Expected: "shadows a function from a used module"
+ */
+
+import & use @math
+
+do main() {
+    temp abs int = 5  // shadows math.abs function
+    println(abs)
+}
+

integration-tests/fail/errors/E5019_range_step_not_integer.ez

@@ -0,0 +1,11 @@
+/*
+ * Error Test: E5019 - range-step-not-integer
+ * Expected: "range step must be integer"
+ */
+
+do main() {
+    for i in range(0, 10, 2.5) {  // step must be integer
+        println(i)
+    }
+}
+

integration-tests/fail/errors/E5020_range_in_operand_not_integer.ez

@@ -0,0 +1,12 @@
+/*
+ * Error Test: E5020 - range-in-operand-not-integer
+ * Expected: "left operand of 'in range()' must be integer"
+ */
+
+do main() {
+    temp x float = 5.0
+    if x in range(0, 10) {  // float cannot be checked against range
+        println("in range")
+    }
+}
+

integration-tests/fail/errors/E5023_postfix_requires_integer.ez

@@ -0,0 +1,10 @@
+/*
+ * Error Test: E5023 - postfix-requires-integer
+ * Expected: "postfix operator requires integer operand"
+ */
+
+do main() {
+    temp x float = 3.14
+    x++  // postfix operator needs integer operand
+}
+

integration-tests/fail/errors/E6002_module_not_found.ez

@@ -0,0 +1,11 @@
+/*
+ * Error Test: E6002 - module-not-found
+ * Expected: "module file not found"
+ */
+
+import @nonexistent_module
+
+do main() {
+    println("test")
+}
+

integration-tests/fail/multi-file/E6009_private_access_denied/main.ez

@@ -0,0 +1,15 @@
+/*
+ * Error Test: E6009 - private-access-denied
+ * Expected: "cannot access private member from outside module"
+ */
+
+import @std
+import "./mylib"
+
+using std
+
+do main() {
+    // This should fail - private_var is private
+    println(mylib.private_var)
+}
+

integration-tests/fail/multi-file/E6009_private_access_denied/mylib/mylib.ez

@@ -0,0 +1,9 @@
+/*
+ * mylib.ez - Library with private variable
+ */
+module mylib
+
+private temp private_var int = 42
+
+temp public_var int = 100
+