CSCI125Code

Download DailyTempsTests.java Copy to Clipboard

import java.util.Random;

/**
 * Simple test of some of the methods
 */
class DailyTempsTests {
    public static void runTests() {
        int days = 12; // >= 10
        DailyTemps dt = new DailyTemps(days);

        // Predefined 24-hour template with wide swings (range = 30+)
        final int[] TEMPLATE = {
                50, 48, 46, 45, 47, 52, 60, 65,
                72, 78, 81, 79, 74, 68, 62, 58,
                55, 57, 62, 67, 70, 68, 62, 56
            };
 
        // Load deterministic data with variety:
        // - Offset changes by day (staggered cold/warm days)
        // - Phase shifts the template to vary the daily profile shape
        for (int d = 0; d < days; d++) {
            int offset = ((d % 6) - 3) * 3;    // -9, -6, -3, 0, 3, 6 repeating
            int shift = (2 * d) % 24;          // phase shift by day
            for (int h = 0; h < 24; h++) {
                int val = TEMPLATE[(h + shift) % 24] + offset;
                dt.set(h, d, val);
            }
        }

        // Compute expected values by scanning the loaded data
        double[] expAvg   = new double[days];
        int[] expHigh  = new int[days];
        int[] expLow   = new int[days];
        int[] expRange = new int[days];
        for (int d = 0; d < days; d++) {
            int min = Integer.MAX_VALUE, max = Integer.MIN_VALUE; 
            long sum = 0;
            for (int h = 0; h < 24; h++) {
                int v = dt.get(h, d); // using get() is fine; we are not testing averages here
                sum += v; 
                min = Math.min(min, v); 
                max = Math.max(max, v);
            }
            expAvg[d]   = sum / 24.0;
            expHigh[d]  = max;
            expLow[d]   = min;
            expRange[d] = max - min;
        }

        // Invoke student methods
        double[] gotAvg   = dt.getAverageTemps();
        int[] gotHigh  = dt.getHighestDailyTemps();
        int[] gotLow   = dt.getLowestDailyTemps();
        int[] gotRange = dt.getDailyDegreeChange(); // defined as high - low per current spec

        // Report comparisons
        System.out.println("--- Daily Averages (int division) ---");
        compareArrays(gotAvg, expAvg, "avg");

        System.out.println("--- Daily Highs ---");
        compareArrays(gotHigh, expHigh, "high");

        System.out.println("--- Daily Lows ---");
        compareArrays(gotLow, expLow, "low");

        System.out.println("--- Daily Range (high - low) ---");
        compareArrays(gotRange, expRange, "range");

    }
    
    private static void compareArrays(double[] got, double[] expected, String label) {
        if (got == null || got.length != expected.length) {
            System.out.println(label + ": wrong length/null (got="
                + (got == null ? "null" : got.length) + ", expected=" + expected.length + ")");
            return;
        }
        boolean ok = true;
        for (int i = 0; i < got.length; i++) {
            if (got[i] != expected[i]) {
                System.out.println(label + " mismatch at day " + i +
                    ": got " + got[i] + ", expected " + expected[i]);
                ok = false;
            }
        }
        if (ok) {
            System.out.print(label + ": OK [");
            for (int i = 0; i < got.length; i++) {
                if (i > 0) System.out.print(", ");
                System.out.print(got[i]);
            }
            System.out.println("]");
        }
    }
    
    private static void compareArrays(int[] got, int[] expected, String label) {
        if (got == null || got.length != expected.length) {
            System.out.println(label + ": wrong length/null (got="
                + (got == null ? "null" : got.length) + ", expected=" + expected.length + ")");
            return;
        }
        boolean ok = true;
        for (int i = 0; i < got.length; i++) {
            if (got[i] != expected[i]) {
                System.out.println(label + " mismatch at day " + i +
                    ": got " + got[i] + ", expected " + expected[i]);
                ok = false;
            }
        }
        if (ok) {
            System.out.print(label + ": OK [");
            for (int i = 0; i < got.length; i++) {
                if (i > 0) System.out.print(", ");
                System.out.print(got[i]);
            }
            System.out.println("]");
        }
    }
}