cell/tests/blob.ce

// blob_test.ce
var Blob = use('blob');
var os = use('os');

log.console("== Blob Module Test Suite ==\n");

var passed = 0;
var failed = 0;

function test(name, fn) {
    try {
        fn();
        passed++;
        log.console("✓ " + name);
    } catch (e) {
        failed++;
        log.console("✗ " + name + ": " + e);
    }
}

function assert(condition, message) {
    if (!condition) {
        throw new Error(message || "Assertion failed");
    }
}

function assertEqual(actual, expected, message) {
    if (actual != expected) {
        throw new Error(message || "Expected " + expected + ", got " + actual);
    }
}

// Test 1: Empty blob creation
test("Create empty blob", function() {
    var b = new Blob();
    assertEqual(b.length, 0, "Empty blob should have length 0");
});

// Test 2: Blob with capacity
test("Create blob with capacity", function() {
    var b = new Blob(100);
    assertEqual(b.length, 0, "New blob with capacity should still have length 0");
});

// Test 3: Write and read single bit
test("Write and read single bit", function() {
    var b = new Blob();
    b.write_bit(true);
    b.write_bit(false);
    b.write_bit(1);
    b.write_bit(0);
    assertEqual(b.length, 4, "Should have 4 bits after writing");
    
    stone(b); // Make it stone to read
    assertEqual(b.read_logical(0), true, "First bit should be true");
    assertEqual(b.read_logical(1), false, "Second bit should be false");
    assertEqual(b.read_logical(2), true, "Third bit should be true (1)");
    assertEqual(b.read_logical(3), false, "Fourth bit should be false (0)");
});

// Test 4: Out of range read throws error
test("Out of range read throws error", function() {
    var b = new Blob();
    b.write_bit(true);
    stone(b);
    
    var threw = false;
    try {
        b.read_logical(100); // Out of range
    } catch (e) {
        threw = true;
    }
    assert(threw, "Out of range read should throw");
    
    threw = false;
    try {
        b.read_logical(-1); // Negative index
    } catch (e) {
        threw = true;
    }
    assert(threw, "Negative index read should throw");
});

// Test 5: Write and read numbers
test("Write and read numbers", function() {
    var b = new Blob();
    b.write_number(3.14159);
    b.write_number(-42);
    b.write_number(0);
    b.write_number(1e20);
    stone(b);
    
    // Read back the numbers
    assertEqual(b.read_number(0), 3.14159, "First number should match");
    assertEqual(b.read_number(64), -42, "Second number should match");
    assertEqual(b.read_number(128), 0, "Third number should match");
    assertEqual(b.read_number(192), 1e20, "Fourth number should match");
});

// Test 6: Write and read text
test("Write and read text", function() {
    var b = new Blob();
    b.write_text("Hello");
    b.write_text("World");
    b.write_text("🎉"); // Unicode test
    stone(b);
    
    assertEqual(b.read_text(0), "Hello", "First text should match");
    // Note: We need to know bit positions to read subsequent strings
});

// Test 7: Write and read blobs
test("Write and read blobs", function() {
    var b1 = new Blob();
    b1.write_bit(true);
    b1.write_bit(false);
    b1.write_bit(true);
    
    var b2 = new Blob(10); // Give it some initial capacity
    b2.write_blob(b1);
    b2.write_bit(false);
    assertEqual(b2.length, 4, "Combined blob should have 4 bits");
    
    stone(b2);
    assertEqual(b2.read_logical(0), true);
    assertEqual(b2.read_logical(1), false);
    assertEqual(b2.read_logical(2), true);
    assertEqual(b2.read_logical(3), false);
});

// Test 8: Copy constructor
test("Blob copy constructor", function() {
    var b1 = new Blob();
    b1.write_bit(true);
    b1.write_bit(false);
    b1.write_bit(true);
    b1.write_bit(true);
    stone(b1);
    
    var b2 = new Blob(b1);
    stone(b2); // Need to stone the copy before reading
    assertEqual(b2.length, 4, "Copied blob should have same length");
    assertEqual(b2.read_logical(0), true);
    assertEqual(b2.read_logical(3), true);
});

// Test 9: Partial copy constructor
test("Blob partial copy constructor", function() {
    var b1 = new Blob();
    for (var i = 0; i < 10; i++) {
        b1.write_bit(i % 2 == 0);
    }
    stone(b1);
    
    var b2 = new Blob(b1, 2, 7); // Copy bits 2-6 (5 bits)
    stone(b2); // Need to stone the copy before reading
    assertEqual(b2.length, 5, "Partial copy should have 5 bits");
    assertEqual(b2.read_logical(0), true); // bit 2 of original
    assertEqual(b2.read_logical(2), true); // bit 4 of original
});

// Test 10: Blob with fill
test("Create blob with fill", function() {
    var b1 = new Blob(8, true); // 8 bits all set to 1
    var b2 = new Blob(8, false); // 8 bits all set to 0
    
    stone(b1);
    stone(b2);
    
    for (var i = 0; i < 8; i++) {
        assertEqual(b1.read_logical(i), true, "Bit " + i + " should be true");
        assertEqual(b2.read_logical(i), false, "Bit " + i + " should be false");
    }
});

// Test 11: Blob with random function
test("Create blob with random function", function() {
    var sequence = [true, false, true, true, false];
    var index = 0;
    
    var b = new Blob(5, function() {
        return sequence[index++] ? 1 : 0;
    });
    
    stone(b);
    for (var i = 0; i < 5; i++) {
        assertEqual(b.read_logical(i), sequence[i], "Bit " + i + " should match sequence");
    }
});

// Test 12: Write pad and pad check
test("Write pad and check padding", function() {
    var b = new Blob();
    b.write_bit(true);
    b.write_bit(false);
    b.write_bit(true);
    b.write_pad(8); // Pad to 8-bit boundary
    
    assertEqual(b.length, 8, "Should be padded to 8 bits");
    stone(b);
    
    assert(b['pad?'](3, 8), "Should detect valid padding at position 3");
    assert(!b['pad?'](2, 8), "Should detect invalid padding at position 2");
});

// Test 13: read_blob method
test("Read blob from stone blob", function() {
    var b1 = new Blob();
    for (var i = 0; i < 16; i++) {
        b1.write_bit(i % 3 == 0);
    }
    stone(b1);
    
    var b2 = b1.read_blob(4, 12); // Read bits 4-11 (8 bits)
    stone(b2); // Need to stone the read blob before reading from it
    assertEqual(b2.length, 8, "Read blob should have 8 bits");
    
    // Check the pattern
    assertEqual(b2.read_logical(2), true); // Original bit 6 (6 % 3 == 0)
    assertEqual(b2.read_logical(5), true); // Original bit 9 (9 % 3 == 0)
});

// Test 14: Stone immutability
test("Stone blob is immutable", function() {
    var b = new Blob();
    b.write_bit(true);
    stone(b);
    
    var threw = false;
    try {
        b.write_bit(false); // Should fail on stone blob
    } catch (e) {
        threw = true;
    }
    assert(threw, "Writing to stone blob should throw error");
});

// Test 15: Multiple stone calls and stone.p check
test("Multiple stone calls are safe and stone.p works", function() {
    var b = new Blob();
    b.write_bit(true);
    assert(!stone.p(b), "Blob should not be a stone before stone() call");
    stone(b);
    assert(stone.p(b), "Blob should be a stone after stone() call");
    stone(b); // Should be safe to call again
    assertEqual(b.read_logical(0), true, "Blob data should remain intact");
    
    // Verify blob.stone is not available
    assert(b.stone == null, "blob.stone should not be available as a method");
});

// Test 16: Invalid constructor arguments
test("Invalid constructor arguments", function() {
    var threw = false;
    try {
        var b = new Blob("invalid");
    } catch (e) {
        threw = true;
    }
    assert(threw, "Invalid constructor arguments should throw");
});

// Test 17: Write invalid bit values
test("Write bit validation", function() {
    var b = new Blob();
    b.write_bit(0);
    b.write_bit(1);
    
    var threw = false;
    try {
        b.write_bit(2); // Should only accept 0, 1, true, false
    } catch (e) {
        threw = true;
    }
    assert(threw, "write_bit with value 2 should throw");
});

// Test 18: Complex data round-trip
test("Complex data round-trip", function() {
    var b = new Blob();
    
    // Write mixed data
    b.write_text("Test");
    b.write_number(123.456);
    b.write_bit(true);
    b.write_bit(false);
    b.write_number(-999.999);
    
    var originalLength = b.length;
    stone(b);
    
    // Verify we can create a copy
    var b2 = new Blob(b);
    stone(b2); // Need to stone the copy before reading
    assertEqual(b2.length, originalLength, "Copy should have same length");
    assertEqual(b2.read_text(0), "Test", "First text should match");
});

// Test 19: Zero capacity blob
test("Zero capacity blob", function() {
    var b = new Blob(0);
    assertEqual(b.length, 0, "Zero capacity blob should have length 0");
    b.write_bit(true); // Should auto-expand
    assertEqual(b.length, 1, "Should expand when writing");
});

// Test 20: Large blob handling
test("Large blob handling", function() {
    var b = new Blob();
    var testSize = 1000;
    
    // Write many bits
    for (var i = 0; i < testSize; i++) {
        b.write_bit(i % 7 == 0);
    }
    
    assertEqual(b.length, testSize, "Should have " + testSize + " bits");
    stone(b);
    
    // Verify pattern
    assertEqual(b.read_logical(0), true, "Bit 0 should be true");
    assertEqual(b.read_logical(7), true, "Bit 7 should be true");
    assertEqual(b.read_logical(14), true, "Bit 14 should be true");
    assertEqual(b.read_logical(15), false, "Bit 15 should be false");
});

// Test 21: Non-stone blob read methods should throw
test("Non-stone blob read methods should throw", function() {
    var b = new Blob();
    b.write_bit(true);
    b.write_number(42);
    b.write_text("test");
    
    // Try to read without stoning - should throw
    var threw = false;
    try {
        b.read_logical(0);
    } catch (e) {
        threw = true;
    }
    assert(threw, "read_logical on non-stone blob should throw");
    
    threw = false;
    try {
        b.read_number(0);
    } catch (e) {
        threw = true;
    }
    assert(threw, "read_number on non-stone blob should throw");
    
    threw = false;
    try {
        b.read_text(0);
    } catch (e) {
        threw = true;
    }
    assert(threw, "read_text on non-stone blob should throw");
    
    threw = false;
    try {
        b.read_blob(0, 10);
    } catch (e) {
        threw = true;
    }
    assert(threw, "read_blob on non-stone blob should throw");
    
    threw = false;
    try {
        b['pad?'](0, 8);
    } catch (e) {
        threw = true;
    }
    assert(threw, "pad? on non-stone blob should throw");
});

// Test 22: Empty text write and read
test("Empty text write and read", function() {
    var b = new Blob();
    b.write_text("");
    stone(b);
    assertEqual(b.read_text(0), "", "Empty string should round-trip");
});

// Test 23: Blob error on invalid read positions
test("Invalid read positions", function() {
    var b = new Blob();
    b.write_number(42);
    stone(b);
    
    var threw = false;
    try {
        b.read_number(-10); // Negative position
    } catch (e) {
        threw = true;
    }
    assert(threw, "Negative position should throw");
    
    threw = false;
    try {
        b.read_number(1000); // Beyond blob length
    } catch (e) {
        threw = true;
    }
    assert(threw, "Position beyond length should throw");
});

// Print summary
log.console("\n== Test Summary ==");
log.console("Total tests: " + (passed + failed));
log.console("Passed: " + passed);
log.console("Failed: " + failed);
log.console("\nOverall: " + (failed == 0 ? "PASSED" : "FAILED"));

$_.stop()