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113 lines
2.2 KiB
113 lines
2.2 KiB
const { ButtonMachine } = require('../../src/node_modules/buttons');
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const run_code = (expecting, code, debug=false) => {
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let machine = new ButtonMachine(code);
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machine.run(debug);
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expect(machine.stack_top).toBe(expecting);
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return machine;
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}
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it('Can do addition', () => {
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run_code(3, [
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['PUSH', 1],
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['PUSH', 2],
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['ADD'],
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])
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});
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it('Can do subtraction', () => {
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run_code(1, [
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['PUSH', 2],
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['PUSH', 1],
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['SUB'],
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])
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})
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it('Can do multiplication', () => {
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run_code(20, [
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['PUSH', 10],
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['PUSH', 2],
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['MUL'],
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])
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})
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it('Can do division', () => {
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run_code(5, [
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['PUSH', 10],
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['PUSH', 2],
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['DIV'],
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])
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})
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it('Can do modulus', () => {
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run_code(0, [
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['PUSH', 10],
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['PUSH', 2],
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['MOD'],
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])
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})
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it('Can loop until the end of clicks', () => {
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run_code(43, [
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['PUSH', 1],
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['PUSH', 1],
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['ADD'],
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['JUMP', 1]
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]);
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});
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it('Can do zero test for jump', () => {
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run_code(0, [
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['PUSH', 20], // start at 20
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['PUSH', 1], // decrement by 1
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['SUB'],
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['JZ', 5], // if we're at 0 jumps to the end
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['JUMP', 1] // the previous test fails so it jumps to loop again
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]);
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});
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it('Can do NOT zero test for jump', () => {
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run_code(-19, [
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['PUSH', -20], // start at 20
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['PUSH', 1], // decrement by 1
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['ADD'],
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['JNZ', 5], // if we're at 0 jumps to the end
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['JUMP', 1] // the previous test fails so it jumps to loop again
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]);
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});
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it('Can store and restor', () => {
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run_code(150, [
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['PUSH', 100], // start with 100
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['STOR', 'AX'], // put it in the regA register
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['PUSH', 50], // push 50 on too
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['ADD'], // add those for 150
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['RSTOR', 'AX'],// recover the original 100
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['SUB'] // sub and should be 150
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]);
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});
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it('Halts on bad registers', () => {
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run_code(0, [
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['PUSH', 0],
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['STOR', 'AX'],
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['RSTOR', 'BAD NAME'], // should cause a halt here
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['PUSH', 100],
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['ADD']
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]);
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});
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it('Can halt on purpose', () => {
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let machine = run_code(0, [
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['PUSH', 0],
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['HALT', 'Done on purpose.']
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]);
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expect(machine.halted).toBe(true);
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expect(machine.error).toBe('Done on purpose.');
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});
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