Day 8: Part 1 and 2

Signed-off-by: James Griffin <james@unsupervised.ca>

eight/day_eight_test.go

@@ -0,0 +1,97 @@
+package eight
+
+import "testing"
+
+func (p *program) visited() int {
+	highest := 0
+	for i, instruction := range p.instructions {
+		if instruction.executed {
+			if i > highest {
+				highest = i
+			}
+		}
+	}
+	return highest
+}
+
+func Test_program_load(t *testing.T) {
+	p := program{}
+	err := p.load("sample.code")
+	if err != nil {
+		t.Log(err)
+		t.FailNow()
+	}
+
+	if len(p.instructions) != 9 {
+		t.Logf("Expected 9 instructions, Got %d instructions", len(p.instructions))
+		t.FailNow()
+	}
+}
+
+func Test_program_execute(t *testing.T) {
+	p := program{}
+	p.load("sample.code")
+
+	result := p.exec()
+	if result != 5 {
+		t.Logf("Expected result of 5, Got %d", result)
+		t.FailNow()
+	}
+}
+
+func Test_program_terminate(t *testing.T) {
+	p := program{}
+	p.load("sample.code")
+
+	p.exec()
+	highest := p.visited()
+	p.flipJmpNop(highest)
+	p.reset()
+	result := p.exec()
+	highest = p.visited()
+
+	if highest+1 != len(p.instructions) {
+		t.Logf("Made it to %d of %d instructions", highest+1, len(p.instructions))
+		t.Fail()
+	}
+
+	if result != 8 || p.preempted {
+		t.Logf("Expected result of 8, Got %d and the program was preempted", result)
+		t.FailNow()
+	}
+}
+
+func Test_program_heal(t *testing.T) {
+	p := program{}
+	p.load("sample.code")
+
+	p.exec()
+	index := p.heal()
+	highest := p.visited()
+
+	if highest+1 != len(p.instructions) {
+		t.Logf("Made it to %d of %d instructions by flipping instruction %d", highest+1, len(p.instructions), index+1)
+		t.Fail()
+	}
+
+	if p.accumulator != 8 || p.preempted {
+		t.Logf("Expected result of 8, Got %d and the program was preempted", p.accumulator)
+		t.FailNow()
+	}
+}
+
+func Test_handheld_terminate(t *testing.T) {
+	p := program{}
+	p.load("handheld.code")
+
+	p.exec()
+	highest := p.visited()
+	t.Logf("Made it to %d of %d instructions on the first run", highest+1, len(p.instructions))
+	p.heal()
+	highest = p.visited()
+
+	if highest+1 != len(p.instructions) || p.preempted {
+		t.Logf("Made it to %d of %d instructions", highest+1, len(p.instructions))
+		t.Fail()
+	}
+}