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test: Add edge case tests for YearsBeforeDesiredBalance in Interest_Is_Interesting #2443

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merged 1 commit into from
Oct 6, 2025
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test: Add edge case tests for YearsBeforeDesiredBalance in Interest_Is_Interesting #2443

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3 changes: 2 additions & 1 deletion exercises/concept/interest-is-interesting/.meta/config.json
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Original file line number Diff line number Diff line change
@@ -1,7 +1,8 @@
{
"authors": [
"ErikSchierboom",
"yzAlvin"
"yzAlvin",
"karanchadha10"
],
"files": {
"solution": [
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14 changes: 14 additions & 0 deletions exercises/concept/interest-is-interesting/InterestIsInterestingTests.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -197,4 +197,18 @@ public void Years_before_desired_balance_for_large_different_between_start_and_t
{
Assert.Equal(85, SavingsAccount.YearsBeforeDesiredBalance(2_345.67m, 12_345.6789m));
}

[Fact]
[Task(4)]
public void Years_before_desired_balance_when_target_already_met()
{
Assert.Equal(0, SavingsAccount.YearsBeforeDesiredBalance(1_000.0m, 1_000.0m));
}

[Fact]
[Task(4)]
public void Years_before_desired_balance_when_target_already_exceeded()
{
Assert.Equal(0, SavingsAccount.YearsBeforeDesiredBalance(1_200.0m, 1_000.0m));
}
}
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